sumpfralle opened a new issue, #12000:
URL: https://github.com/apache/nuttx/issues/12000

   The rendered docs contain Makefile snippets in some places, e.g.: 
https://nuttx.apache.org/docs/latest/guides/customapps.html#makefile
   
   The content of the snippet is supposed to be exportable via the "copy" 
button in the top right corner.
   But for the above example only a broken/mangled text is exported: 
   ```
   
   
   
   
   files
   
   
   
   
   
   
   Build targets
   
   
   
   
   
   Compile C Files
   
   (COBJS): %$(OBJEXT): %.c
   (call COMPILE, $<, $@)
   
   Add object files to the apps archive
   
   
   (call ARCHIVE, libapps.a, $(COBJS))
   
   Create directory links
   
   
   
   Setup any special pre-build context
   
   
   
   Setup any special pre-configuration context
   
   
   
   Make the dependency file, Make.deps
   
   
   (Q) $(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(SRCS) > Make.dep
   
   Clean the results of the last build
   
   
   (call CLEAN)
   
   Remove the build context and directory links
   
   
   
   Restore the directory to its original state
   
   
   (call DELFILE, Make.dep)
   
   Include dependencies
   
   ```
   
   The following details are missing:
   * leading `$`
   * leading `#`
   * some other lines
   * indentation (spaces instead of tabs)
   
   The indentation issue is minor, since `make` (and editors) will complain 
about mangling, anyway.
   
   But the first two issues (especially missing `$`) can really take a lot of 
time to understand/debug (makefile error messages are sometimes hard to grasp).
   
   It looks like 
[copybutton.js](https://nuttx.apache.org/docs/latest/_static/copybutton.js) 
causes the issue:
   ```js
   // get filtered text
   let exclude = '.linenos, .gp, .go';
   ```
   
   The above code snippet causes the removal of all "nodes" with the 
`.linenos`, `.gp` and `.go` CSS classes.
   
   The `.gp` class seems to be used for the comment characters (`#`) and for 
`$`.
   
   The `.go` class is used for most assignments.
   
   The above exclusions are configured in `Documentation/conf.py`. They were 
introduced in 
   14d311ca0ab4eef693f92ca8ad1f97af098157e5 (with the addition of sphinx's 
"copy button" feature). I assume, `.go` and `.gp` can be removed without 
causing issues.


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