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Improve documentation of 'emacs-version'

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* doc/emacs/trouble.texi (Checklist): Mention the possibility of
invoking 'emacs-version' with a prefix argument.

* lisp/version.el (emacs-version): Improve doc string.  (Bug#53720)
This commit is contained in:
Eli Zaretskii 2022-02-02 19:38:56 +02:00
parent 1bb5553619
commit ab2f275422
2 changed files with 13 additions and 6 deletions
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10
doc/emacs/trouble.texi
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@ -782,10 +782,12 @@ Emacs, so you will have to report the bug somewhere else.
@item @item
The type of machine you are using, and the operating system name and The type of machine you are using, and the operating system name and
version number (again, automatically included by @kbd{M-x version number (again, automatically included by @w{@kbd{M-x
report-emacs-bug}). @kbd{M-x emacs-version @key{RET}} provides this report-emacs-bug}}). @w{@kbd{M-x emacs-version @key{RET}}} provides
information too. Copy its output from the @file{*Messages*} buffer, this information too. Copy its output from the @file{*Messages*}
so that you get it all and get it accurately. buffer, so that you get it all and get it accurately, or use
@w{@kbd{C-u M-x emacs-version @key{RET}}} to insert the version
information into the current buffer.
@item @item
The operands given to the @code{configure} command when Emacs was The operands given to the @code{configure} command when Emacs was

9
lisp/version.el
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@ -54,8 +54,13 @@ developing Emacs.")
(defvar cairo-version-string) (defvar cairo-version-string)
(defun emacs-version (&optional here) (defun emacs-version (&optional here)
"Return string describing the version of Emacs that is running. "Display the version of Emacs that is running in this session.
If optional argument HERE is non-nil, insert string at point. With a prefix argument, insert the Emacs version string at point
instead of displaying it.
If called from Lisp, by default return the version string; but
if the optional argument HERE is non-nil, insert the string at
point instead.
Don't use this function in programs to choose actions according Don't use this function in programs to choose actions according
to the system configuration; look at `system-configuration' instead." to the system configuration; look at `system-configuration' instead."
(interactive "P") (interactive "P")