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bug#28774: Master, emacs-26: Can't add text property to built-in functio
bug#28774: Master, emacs-26: Can't add text property to built-in function name.
Tue, 10 Oct 2017 07:01:52 -0700 (PDT)
> It seems ido-completions relies on (format "%s" str) to return a copy of
> str. This fixes it:
If `format' no longer always copies STR in this context then
its doc should be updated, I think.
Format a string out of a format-string and arguments.
The first argument is a format control string.
The other arguments are substituted into it to make the
result, a string.
suggests that it creates a new string, or at most reuses
the format string (e.g., "%s"), modifying it by substituting
STR for %s in it. If in fact it can sometimes simply return
STR then this should be mentioned explicitly, to avoid confusion.
(And why was this change made? Was it just to save a string
This is an incompatible Lisp change, if it is new. In that
case, it should be documented as such.