Delete duplicated def of \expc in tex

[OptHuang]

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[github-actions]

@check-spelling-bot Report

🔴 Please review

See the 📂 files view, the 📜action log, or 📝 job summary for details.

Unrecognized words (3)

cov
lualatex
xelatex

Some files were automatically ignored 🙈

These sample patterns would exclude them:

^\Qbiber/example_biber-tool.conf\E$

You should consider adding them to:

.github/actions/spelling/excludes.txt

File matching is via Perl regular expressions.

To check these files, more of their words need to be in the dictionary than not. You can use patterns.txt to exclude portions, add items to the dictionary (e.g. by adding them to allow.txt), or fix typos.

To accept these unrecognized words as correct and update file exclusions, you could run the following commands

... in a clone of the git@github.com:equipez/textools.git repository
on the OptHuang-patch-1 branch (ℹ️ how do I use this?):

curl -s -S -L 'https://raw.githubusercontent.com/check-spelling/check-spelling/main/apply.pl' |
perl - 'https://github.com/equipez/textools/actions/runs/13546449854/attempts/1'

OR

To have the bot accept them for you, comment in the PR quoting the following line:
@check-spelling-bot apply updates.

Available 📚 dictionaries could cover words not in the 📘 dictionary

Dictionary	Entries	Covers	Uniquely
cspell:latex/dict/latex.txt	434	1	1
cspell:r/src/r.txt	543	1
cspell:golang/dict/go.txt	2099	1

Consider adding them (in .github/workflows/spelling.yml) in jobs:/spelling: for uses: check-spelling/check-spelling@main in its with:

      with:
        extra_dictionaries: |
          cspell:latex/dict/latex.txt
          cspell:r/src/r.txt
          cspell:golang/dict/go.txt

To stop checking additional dictionaries, add (in .github/workflows/spelling.yml) for uses: check-spelling/check-spelling@main in its with:

check_extra_dictionaries: ''

Warnings (1)

See the 📂 files view, the 📜action log, or 📝 job summary for details.

⚠️ Warnings	Count
⚠️ noisy-file	1

See ⚠️ Event descriptions for more information.

If the flagged items are 🤯 false positives

If items relate to a ...

• binary file (or some other file you wouldn't want to check at all).

  Please add a file path to the excludes.txt file matching the containing file.

  File paths are Perl 5 Regular Expressions - you can test yours before committing to verify it will match your files.

  ^ refers to the file's path from the root of the repository, so ^README\.md$ would exclude README.md (on whichever branch you're using).

• well-formed pattern.

  If you can write a pattern that would match it,
  try adding it to the patterns.txt file.

  Patterns are Perl 5 Regular Expressions - you can test yours before committing to verify it will match your lines.

  Note that patterns can't match multiline strings.