`defun` and punctuation marks

[Werner LEMBERG]

[texinfo.tex 2021-04-25.21]

Have a look at the following example.

```
\input texinfo.tex

@defun foo bar? bar bar
text
@end defun

@defun foo bar?@: bar bar
text
@end defun

@bye
```

As can be seen, the space after the question mark is larger in the
first example, which is not appropriate here.

Some Lisp dialects like Scheme use question and exclamation marks
extensively in function and argument names, so this is a real issue.
In particular, LilyPond's Scheme functions are full of it :-)


    Werner