emacs-29 b0181dafb9e 1/2: Improve documentation of 'enable-local-variables' in Emacs manual

[Eli Zaretskii]

branch: emacs-29
commit b0181dafb9ee9eb6786128e44a5a4164de1ae8c2
Author: YugaEgo <yet@ego.team>
Commit: Eli Zaretskii <eliz@gnu.org>

    Improve documentation of 'enable-local-variables' in Emacs manual
    
    * doc/emacs/custom.texi (Safe File Variables): Document ':all'.
    (Bug#64621)
---
 doc/emacs/custom.texi | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/doc/emacs/custom.texi b/doc/emacs/custom.texi
index 87290734cc9..9bbef7dd508 100644
--- a/doc/emacs/custom.texi
+++ b/doc/emacs/custom.texi
@@ -1349,9 +1349,11 @@ be permanently ignored, customize 
@code{ignored-local-variable-values}.
 way Emacs processes local variables.  Its default value is @code{t},
 which specifies the behavior described above.  If it is @code{nil},
 Emacs simply ignores all file local variables.  @code{:safe} means use
-only the safe values and ignore the rest.  Any other value says to
-query you about each file that has local variables, without trying to
-determine whether the values are known to be safe.
+only the safe values and ignore the rest.  @code{:all} instructs Emacs
+to set all file local variables (we advise not to use it permanently).
+Any other value says to query you about each file that has local
+variables, without trying to determine whether the values are known to
+be safe.
 
 @vindex enable-local-eval
 @vindex safe-local-eval-forms