Awesome
TeXtidote: a correction tool for LaTeX documents and other formats
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Have you ever thought of using a grammar checker on LaTeX files?
If so, you probably know that the process is far from simple. Since LaTeX documents contain special commands and keywords (the so-called "markup") that are not part of the "real" text, you cannot run a grammar checker directly on these files: it cannot tell the difference between markup and text. The other option is to remove all this markup, leaving only the "clear" text; however, when a grammar tool points to a problem at a specific line in this clear text, it becomes hard to retrace that location in the original LaTeX file.
TeXtidote solves this problem; it can read your original LaTeX file and perform various sanity checks on it: for example, making sure that every figure is referenced in the text, enforcing the correct capitalization of titles, etc. In addition, TeXtidote can remove markup from the file and send it to the Language Tool library, which performs a verification of both spelling and grammar in a dozen languages. What is unique to TeXtidote is that it keeps track of the relative position of words between the original and the "clean" text. This means that it can translate the messages from Language Tool back to their proper location directly in your source file.
You can see the list of all the rules checked by TeXtidote at the end of this file.
TeXtidote also supports spelling and grammar checking of files in the Markdown format.
Getting TeXtidote
You can either install TeXtidote by downloading it manually, or by installing it using a package.
Under Debian systems: install package
Under Debian systems (Ubuntu and derivatives), you can install TeXtidote using
dpkg
. Download the latest .deb
file in the
Releases page; suppose
it is called textidote_X.Y.Z_all.deb
. You can install TeXtidote by typing:
$ sudo apt-get install ./textidote_X.Y.Z_all.deb
The ./
is mandatory; otherwise the command won't work.
Manual download
You can also download the TeXtidote executable manually: this works on all operating systems. Simply make sure you have Java version 8 or later installed on your system. Then, download the latest release of TeXtidote; put the JAR in the folder of your choice.
Using TeXtidote
TeXtidote is run from the command line. The TeXtidote repository contains a sample LaTeX file called example.tex. Download this file and save it to the folder where TeXtidote resides. You then have the choice of producing three types of "reports" on the contents of your file: an "HTML" report (viewable in a web browser), a "console" report (viewable in a terminal) and a "single-line" report (typically destined to be consumed by other scripts, see below).
HTML report
To run TeXtidote and perform a basic verification of the file, run:
java -jar textidote.jar --output html example.tex > report.html
In Linux, if you installed TeXtidote using apt-get
, you can also call it
directly by typing:
textidote --output html example.tex > report.html
Here, the --output html
option tells TeXtidote to produce a report in HTML format;
the >
symbol indicates that the output should be saved to a file, whose name
is report.html
. TeXtidote will run for some time, and print:
TeXtidote v0.8 - A linter for LaTeX documents
(C) 2018-2019 Sylvain Hallé - All rights reserved
Found 23 warnings(s)
Total analysis time: 2 second(s)
Once the process is over, switch to your favorite web browser, and open the
file report.html
(using the File/Open menu). You should see something like this:
As you can see, the page shows your original LaTeX source file, where some portions have been highlighted in various colors. These correspond to regions in the file where an issue was found. You can hover your mouse over these colored regions; a tooltip will show a message that describes the problem.
If you don't write any filename (or write --
as the filename), TeXtidote
will attempt to read one from the standard input.
Plain report
To run TeXtidote and display the results directly in the console, simply omit
the --output html
option (you can also use --output plain
), and do not redirect the output to a file:
java -jar textidote.jar example.tex
TeXtidote will analyze the file like before, but produce a report that looks like this:
* L25C1-L25C25 A section title should start with a capital letter. [sh:001]
\section{a first section}
^^^^^^^^^^^^^^^^^^^^^^^^^
* L38C1-L38C29 A section title should not end with a punctuation symbol.
[sh:002]
\subsection{ My subsection. }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* L15C94-L15C99 Add a space before citation or reference. [sh:c:001]
things, like a citation\cite{my:paper} .The text
Each element of the list corresponds to a "warning", indicating that something in the text requires your attention. For each warning, the position in the original source file is given: LxxCyy indicates line xx, column yy. The warning is followed by a short comment describing the issue, and an excerpt from the line in question is displayed. The range of characters where the problem occurs is marked by the "^^^^" symbols below the text. Each of these warnings results from the evaluation of some "rule" on the text; an identifier of the rule in question is also shown between brackets.
Single line report
Another option to display the results directly in the console is the single line report:
java -jar textidote.jar --output singleline example.tex
Textidote will analyze the file like before, but this time the report looks like this:
example.tex(L25C1-L25C25): A section title should start with a capital letter. "\section{a first section}"
example.tex(L38C1-L38C29): A section title should not end with a punctuation symbol. "\subsection{ My subsection. }"
example.tex(L15C94-L15C99): Add a space before citation or reference. "things, like a citation\cite{my:paper} .The text"
Each line corresponds to a warning, and is parseable by regular expressions easily, e.g., for further processing in another tool. The file is given at the beginning of the line, followed by the position in parentheses. Then, the warning message is given, and the excerpt causing the warning is printed in double quotes (""). Note, that sometimes it may happen that a position cannot be determined. In this case, instead of LxxCyy, ? is printed.
You can disable the use of color in any form of command-line output using the
--no-color
switch.
Spelling, grammar and style
You can perform further checks on spelling and grammar, by passing the
--check
option at the command line. For example, to check text in English,
you run:
java -jar textidote.jar --check en example.tex
The --check
parameter must be accompanied by a two-letter code indicating
the language to be used. Language Tool is a powerful library that can verify
spelling, grammar, and even provide suggestions regarding style. TeXtidote
simply passes a cleaned-up version of the LaTeX file to Language Tool,
retrieves the messages it generates, and coverts the line and column numbers
associated to each message back into line/column numbers of the original
source file. For more information about the kind of verifications made by
Language Tool, please refer to its website.
Additionally, the --firstlang lang
option can be used to make Language Tool check for false friends in your first language.
For example, to check a text in english, when your first language is german, you may run:
java -jar textidote.jar --check en --firstlang de example.tex
The language codes you can use are:
de
: (Germany) German, and the variantsde_AT
(Austrian) andde_CH
(Swiss)en
: (US) English, and the variantsen_CA
(Canadian) anden_UK
(British)es
: Spanishfr
: Frenchnl
: Dutchpt
: Portuguesepl
: Polish
Using a dictionary
If you have a list of words that you want TeXtidote to ignore when checking
spelling, you can use the --dict
parameter to specify the location of a
text file:
java -jar textidote.jar --check en --dict dico.txt example.tex
The file dico.txt
must be a plain text file contain a list of words to be
ignored, with each word on a separate line. (The list is case sensitive.)
If you already spell checked you file using Aspell and
saved a local dictionary
(as is done for example by the
PaperShell environment),
TeXtidote can automatically load this dictionary when invoked. More
specifically, it will look for a file called .aspell.XX.pws
in the folder
where TeXtidote is started (this is the filename Aspell gives to local
dictionaries). The characters XX
are to be replaced with the two-letter
language code. If such a file exists, TeXtidote will load it and mention it at
the console:
Found local Aspell dictionary
Analyzing a file from the clipboard
If you omit a filename, TeXtidote analyzes the standard input. You can use this to copy a piece of code to the clipboard and analyze it without the need to save it as a file first. The procedure depends on your operating system.
- In Linux, you can copy text and pipe it to TeXtidote using xclip:
xclip -o | textidote [options...]
. - In Windows' PowerShell, the same can be done with GetClipboard:
GetClipboard | textidote [options...]
- In MacOS X, the same can be done with pbpaste:
pbpaste | textidote [options...]
Ignoring rules
You may want to ignore some of TeXtidote's advice. You can do so by specifying
rule IDs to ignore with the --ignore
command line parameter. For example,
the ID of the rule "A section title should start with a capital letter" is
sh:001
(rule IDs are shown between brackets in the reports given by
TeXtidote); to ignore warnings triggered by this rule, you call TeXtidote as
follows:
java -jar textidote.jar --ignore sh:001 myfile.tex
If you want to ignore multiple rules, separate their IDs with a comma (but no space).
Ignoring environments
TeXtidote can be instructed to remove user-specified environments using the --remove
command line parameter. For example:
$ java -jar textidote.jar --remove itemize myfile.tex
This command will remove all text lines between \begin{itemize}
and \end{itemize}
before further processing the file.
Ignoring macros
The same can be done with macros:
$ java -jar textidote.jar --remove-macros foo myfile.tex
This command will remove all occurrences of use-defined command \foo
in the text. Alternate syntaxes like \foo{bar}
and \foo[x=y]{bar}
are also recognized and deleted.
Replacing strings
Before TeXtidote analyses a file, you can ask it to apply a set of find/replace operations (for example, to replace a macro by some predefined character string). You can write these patterns into a text file and pass them to the program at the command line:
$ java -jar textidote.jar --replace replacements.txt
Here, replacements.txt
is the file that contains the find/replace patterns,
fomatted as follows:
# Empty lines beginning with a pound sign are ignored
# Search and replace patterns are separated by a tab
find replace
foo bar
# Patterns can also be regular expressions
abc\d+[^x] 123
Replacement rules are applied line-wise, so multiline replacements are not possible.
Reading a sub-file
By default, TeXtidote ignores everything before the \begin{document}
command. If you have a large document that consists of multiple included LaTeX
"sub-files", and you want to check one such file that does not contain a
\begin{document}
, you must tell TeXtidote to read all the file using the
--read-all
command line option. Otherwise, TeXtidote will ignore the whole
file and give you no advice.
TeXtidote also automatically follows sub-files that are embedded from a main document using \input{filename}
and \include{filename}
(braces are mandatory). Any such non-commented instruction will add the corresponding filename to the running queue. If you want to exclude an \input
from being processed, you must surround the line with ignore begin
/end
comments (see below, Helping TeXtidote).
TeXtidote takes into account the %!TEX root = ...
directive for following sub-files. You can also use --root
argument to specify it separatedly.
However, if your usecase requires a more complex handling of sub-files you can use many of the available tools to pre-process your project. Some
suggestions are listed here.
Removing markup
You can also use TeXtidote just to remove the markup from your original LaTeX
file. This is done with the option --clean
:
java -jar textidote.jar --clean example.tex
By default, the resulting "clean" file is printed directly at the console. To save it to a file, use a redirection:
java -jar textidote.jar --clean example.tex > clean.txt
You will see that TeXtidote performs a very aggressive deletion of LaTeX markup:
- All
figure
,table
andtabular
environments are removed - All equations are removed
- All inline math expressions (
$...$
) are replaced by "X" - All
\cite
commands are replaced by "0" - All
\ref
commands are replaced by "[0]" - Commands that alter text (
\textbf
,\emph
,\uline
,\footnote
) are removed (but the text is kept) - Virtually all other commands are simply deleted
Surprisingly, the result of applying these modifications is a text that is clean and legible enough for a spelling or grammar checker to provide sensible advice.
As was mentioned earlier, TeXtidote keeps a mapping between character ranges
in the "cleaned" file, and the same character ranges in the original LaTeX
document. You can get this mapping by using the --map
option:
java -jar textidote.jar --clean --map map.txt example.tex > clean.txt
The --map
parameter is given the name of a file. TeXtidote will put in this
file the list of correspondences between character ranges. This file is made
of lines that look like this:
L1C1-L1C24=L1C5-L128
L1C26-L1C28=L1C29-L1C31
L2C1-L2C10=L3C1-L3C10
...
The first entry indicates that characters 1 to 24 in the first line of the clean file correspond to characters 5 to 28 in the first line of the original LaTeX file --and so on. This mapping can have "holes": for example, character 25 line 1 does not correspond to anything in the original file (this happens when the "cleaner" inserts new characters, or replaces characters from the original file by something else). Conversely, it is also possible that characters in the original file do not correspond to anything in the clean file (this happens when the cleaner deletes characters from the original).
Character encodings
TeXtidote uses the OS default encoding when reading files (e.g. utf-8
in Linux, cp1252
in Windows). You can override this setting using the --encoding
command line option:
java -jar textidote.jar --encoding cp1252 example.tex
Using a configuration file
If you need to run TeXtidote with many command line arguments (for example:
you load a local dictionary, ignore a few rules, apply replacements, etc.), it
may become tedious to invoke the program with a long list of arguments every
time. TeXtidote can be "configured" by putting those arguments in a text
file called .textidote
in the directory from which it is called. Here is an
example of what such a file could contain:
--output html --read-all
--replace replacements.txt
--dict mydict.txt
--ignore sh:001,sh:d:001
--check en mytext.tex
As you can see, arguments can be split across multiple lines. You can then call TeXtidote without any arguments like this:
textidote > report.html
If you call TeXtidote with command line arguments, they will be merged with
whatever was found in .textidote
. You can also tell TeXtidote to explicitly
ignore that file and only take into account the command line arguments using
the --no-config
argument.
Markdown input
TeXtidote also supports files in the Markdown format. The only difference is that rules specific to LaTeX (references to figures, citations) are not evaluated.
Simply call TeXtidote with a Markdown input file instead of a LaTeX file. The format is auto-detected by looking at the file extension. However, if you pass a file through the standard input, you must tell TeXtidote that the input file is Markdown by using the command line parameter --type md
. Otherwise, TeXtidote assumes by default that the input file is LaTeX.
Helping TeXtidote
It order to get the best results when using TeXtidote, it is advisable that you follow a few formatting conventions when writing your LaTeX file:
- Avoid putting multiple
\begin{environment}
and/or\end{environment}
on the same line - Keep the arguments of a command on a single line. Commands (such as
\title{}
) that have their opening and closing braces on different lines are not recognized by TeXtidote and will result in garbled output and nonsensical warnings. - Do not hard-wrap your paragraphs. It is easier for TeXtidote to detect paragraphs if they have no hard carriage returns inside. (If you need word wrapping, it is preferable to enable it in your text editor.)
- Put headings like
\section
or\paragraph
alone on their line and separate them from the text below by a blank line.
As a rule, it is advisable to first see what your text looks like using the
--clean
option, to make sure that TeXtidote is performing checks on
something that makes sense.
If you realize that a portion of LaTeX markup is not handled properly and messes up the rest of the file, you can tell TeXtidote to ignore a region using a special LaTeX comment:
% textidote: ignore begin
Some weird LaTeX markup that TeXtidote does not
understand...
% textidote: ignore end
The lines between textidote: ignore begin
and textidote: ignore end
will
be handled by TeXtidote as if they were comment lines.
When you are using markdown you can also selectively ignore parts of the document:
<!-- textidote: ignore begin -->
This should be ignored
<!-- textidote: ignore end -->
Linux shortcuts
To make using TeXtidote easier, you can create shortcuts on your system. Here are a few recommended tips.
First, we recommend you create a folder called /opt/textidote
and put the
big textidote.jar
file there (this requires root privileges). This step is
already taken care of if you installed the TeXtidote package using apt-get
.
Command line shortcut
(This step is not necessary if TeXtidote has been installed with apt-get
.)
In/usr/local/bin
, create a file called textidote
with the following
contents:
#! /bin/bash
java -jar /opt/textidote/textidote.jar "$@"
Make this file executable by typing at the command line:
sudo chmod +x /usr/local/bin/textidote
(These two operations also require root privileges.) From then on, you can
invoke TeXtidote on the command line from any folder by simply typing
textidote
, e.g.:
textidote somefile.tex
Desktop shortcut
If you use a desktop environment such as Gnome or Xfce, you can automate
this even further by creating a TeXtidote icon on your desktop. First,
create a file called /opt/textidote/textidote-desktop.sh
with the following
contents, and make this file executable:
#!/bin/bash
if [ -x /usr/bin/notify-send ]; then
err() { notify-send -a TeXtidote -i /opt/textidote/textidote-icon.svg "$*"; }
else
err() { printf "%s\n" "$*" >&2; }
fi
[ $# -lt 1 ] && err "At least one file should be provided as input" && exit
dir=$(dirname "$1")
pushd "$dir" || err "$dir does not exist" && exit
java -jar /opt/textidote/textidote.jar --check en --output html "$@" > /tmp/textidote.html
popd || exit
xdg-open /tmp/textidote.html &
This script enters into the directory of the file passed as an argument, calls TeXtidote, sends the HTML report to a temporary file, and opens the default web browser to show that report.
Then, on your desktop (typically in your ~/Desktop
folder), create another
file called TeXtidote.desktop
with the following contents:
[Desktop Entry]
Version=1.0
Type=Application
Name=TeXtidote
Comment=Check text with TeXtidote
Exec=/opt/textidote/textidote-desktop.sh %F
Icon=/opt/textidote/textidote-icon.svg
Path=
Terminal=false
StartupNotify=false
This will create a new desktop shortcut; make this file executable. From then on, you can drag LaTeX files from your file manager with your mouse and drop them on the TeXtidote icon. After the analysis, the report will automatically pop up in your web browser. Voilà!
MacOS Shortcut
On MacOS, first open Automator, select Application, double-click on the
Run Shell Script
item in the library, select to receive input as arguments
and enter the following:
[ $# -lt 1 ] && echo "At least one file should be provided as input" 1>&2 && exit 1
dir=$(dirname "$1")
cd "$dir" || (echo "$dir does not exist" 1>&2 && exit 1)
java -jar /path/to/textidote.jar --check en --output html "$@" > /tmp/textidote.html || true
open /tmp/textidote.html
Remember to modify /path/to/textidote.jar
to the correct location.
Finally, go to File->Save to create the shortcut. You can add this application
to the Dock or the location you prefer. From then on, you can drag LaTeX files
with your mouse and drop them on the created app. After the analysis, the
report will automatically pop up in your web browser. Voilà!
Tab completions
You can auto-complete the commands you type at the command-line using the TAB
key (as you are probably used to). If you installed TeXtidote using apt-get
,
auto-completion for Bash comes built-in.
You can also enable auto-completion for other shells as follows.
Zsh
Users of Zsh can also enable auto-completion; in your
~/.zshrc
file, add the line
source /opt/textidote/textidote.zsh
(Create the file if it does not exist.) You must then restart your Zsh shell for the changes to take effect.
Visual Studio Code integration
Users of Visual Studio Code can integrate TeXtidote by calling it with the --output singleline
and --no-color
options and parse its results. Moreover, user cphyc also wrote a nice build task.
Emacs integration
Emacs users can benefit from TeXtidote through flycheck.
A dedicated flycheck-checker
can be defined as in the following init.el/.emacs
snippet.
Replace ~/PATH/TO/textidote.jar
with the correct path for your system.
(flycheck-define-checker tex-textidote
"A LaTeX grammar/spelling checker using textidote.
See https://github.com/sylvainhalle/textidote"
:modes (latex-mode plain-tex-mode)
:command ("java" "-jar" (eval (expand-file-name "~/PATH/TO/textidote.jar"))
"--read-all"
"--output" "singleline"
"--no-color"
"--check" (eval (if ispell-current-dictionary (substring ispell-current-dictionary 0 2) "en"))
;; Try to honor local aspell dictionary and replacements if they exist
"--dict" (eval (expand-file-name "~/.aspell.en.pws"))
"--replace" (eval (expand-file-name "~/.aspell.en.prepl"))
;; Using source ensures that a single temporary file in a different dir is created
;; such that textidote won't process other files. This serves as a hacky workaround for
;; https://github.com/sylvainhalle/textidote/issues/200.
source)
:error-patterns ((warning line-start (file-name)
"(L" line "C" column "-" (or (seq "L" end-line "C" end-column) "?") "): "
(message (one-or-more (not "\""))) (one-or-more not-newline) line-end)))
(add-to-list 'flycheck-checkers 'tex-textidote)
Rules checked by TeXtidote
Here is a list of the rules that are checked on your LaTeX file by TeXtidote. Each rule has a unique identifier, written between square brackets.
Language Tool
In addition to all the rules below, the --check xx
option activates all the
rules verified by Language Tool
(more than 2,000 grammar and spelling errors). Note that the verification time
is considerably longer when using that option.
If the --check
option is used, you can add the --languagemodel xx
option to find errors using n-gram data. In order to do so, xx
must be a path pointing to an n-gram-index directory. Please refer to the LanguageTool page (link above) on how to use n-grams and what this directory should contain.
Style
- A section title should start with a capital letter. [sh:001]
- A section title should not end with a punctuation symbol. [sh:002]
- A section title should not be written in all caps. The LaTeX stylesheet takes care of rendering titles in caps if needed. [sh:003]
- Use a capital letter when referring to a specific section, chapter or table: 'Section X'. [sh:secmag, sh:chamag, sh:tabmag]
- A (figure, table) caption should end with a period. [sh:capperiod]
Citations and references
- There should be one space before a \cite or \ref command [sh:c:001], and no space after [sh:c:002].
- Do not use 'in [X]' or 'from [X]': the syntax of a sentence should not be changed by the removal of a citation. [sh:c:noin]
- Do not mix
\cite
and\citep
or\citet
in the same document. [sh:c:mix] - When citing more than one reference, do not use multiple
\cite
commands; put all references in the same\cite
. [sh:c:mul, sh:c:mulp]
Figures
- Every figure should have a label, and every figure should be referenced at least once in the text. [sh:figref]
- Use a capital letter when referring to a specific figure: 'Figure X'. [sh:figmag]
Structure
- A section should not contain a single sub-section. More generally, a division of level n should not contain a single division of level n+1. [sh:nsubdiv]
- The first heading of a document should be the one with the highest level. For example, if a document contains sections, the first section cannot be preceded by a sub-section. [sh:secorder]
- There should not be a jump down between two non-successive section
levels (e.g. a
\section
followed by a\subsubsection
without a\subsection
in between). [sh:secskip] - You should avoid stacked headings, i.e. consecutive headings without text in between. [sh:stacked]
Hard-coding
- Figures should not refer to hard-coded local paths. [sh:relpath]
- Do not refer to sections, figures and tables using a hard-coded number.
Use
\ref
instead. [sh:hcfig, sh:hctab, sh:hcsec, sh:hccha] - You should not break lines manually in a paragraph with
\\
. Either start a new paragraph or stay in the current one. [sh:nobreak] - If you are writing a research paper, do not hard-code page breaks with
\newpage
. [sh:nonp]
LaTeX subtleties
- Use a backslash or a comma after the last period in "i.e.", "e.g." and "et al."; otherwise LaTeX will think it is a full stop ending a sentence. [sh:010, sh:011]
- There should not be a space before a semicolon or a colon. If in your language, typographic rules require a space here, LaTeX takes care of inserting it without your intervention. [sh:d:005, sh:d:006]
Potentially suspicious
- There should be at least N words between two section headings (currently N=100). [sh:seclen]
Hints for using CI (Continuous Integration)
TeXtidote returns the number of warnings as exit code.
GitHub and Gitlab exspect a default exit code auf 0
or else the pipeline will fail.
To circumvent this you have disable this feature.
Github
continue-on-error: true
See more at GitHub documentation
Gitlab
allow_failure: true
See more at Gitlab documentation
Building TeXtidote
First make sure you have the following installed:
- The Java Development Kit (JDK) to compile. TeXtidote requires version 8 of the JDK (and probably works with later versions).
- Ant to automate the compilation and build process
Download the sources for TeXtidote from GitHub or clone the repository using Git:
git clone git@github.com:sylvainhalle/textidote.git
Compiling
First, download the dependencies by typing:
ant download-deps
Then, compile the sources by simply typing:
ant
This will produce a file called textidote.jar
in the folder. This
file is runnable and stand-alone, or can be used as a library, so it can be
moved around to the location of your choice.
In addition, the script generates in the docs/doc
folder the Javadoc
documentation for using TeXtidote.
Testing
TeXtidote can test itself by running:
ant test
Unit tests are run with jUnit; a detailed report of
these tests in HTML format is available in the folder tests/junit
, which
is automatically created. Code coverage is also computed with
JaCoCo; a detailed report is available
in the folder tests/coverage
.
About the author
TeXtidote was written by Sylvain Hallé, Full Professor in the Department of Computer Science and Mathematics at Université du Québec à Chicoutimi, Canada.
Like TeXtidote?
TeXtidote is free software licensed under the GNU General Public License 3. It is released as postcardware: if you use and like the software, please tell the author by sending a postcard of your town at the following address:
Sylvain Hallé
Department of Computer Science and Mathematics
Univerité du Québec à Chicoutimi
555, boulevard de l'Université
Chicoutimi, QC
G7H 2B1 Canada
If you like TeXtidote, you might also want to look at PaperShell, a template environment for writing scientific papers in LaTeX.
References to TeXtidote
Some evidence that TeXtidote is used by actual humans:
- Someone developed an extension for Vim
- A demo video shows how to use it (and I was not involved in this)
- TeXtidote is part of the formulas in Homebrew
- Number of downloads and GitHub stars ;-)
Why is it called TeXtidote?
TeXtidote is a play on Antidote, which is a spelling/grammar checker well known to French-speaking users and works with word processors. So TeXtidote is like a version of Antidote for TeX.
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