Improve documentation of Text Mode

* doc/emacs/text.texi (Text Mode): Improve indexing.  Document
'text-mode-ispell-word-completion'.

(cherry picked from commit 6c9855d3364b4e9b18d436aa1d6490e004d05d7b)

diff --git a/doc/emacs/text.texi b/doc/emacs/text.texi
index cb347d5994857c4d34aca3ca5a7cd73b16b0a461..f5e31fd277f605d5df68095eaeb8c13238b63a35 100644 (file)
--- a/doc/emacs/text.texi
+++ b/doc/emacs/text.texi
@@ -943,12 +943,15 @@ situations where you shouldn't change the major mode---in mail
 composition, for instance.
 
 @kindex M-TAB @r{(Text mode)}
+@findex completion-at-point@r{, in Text Mode}
+@vindex text-mode-ispell-word-completion
   The command @kbd{M-@key{TAB}} (@code{completion-at-point}) performs
 completion of the partial word in the buffer before point, using the
 spelling dictionary as the space of possible words by default.
 @xref{Spelling}.  If your window manager defines @kbd{M-@key{TAB}} to
 switch windows, you can type @kbd{@key{ESC} @key{TAB}} or @kbd{C-M-i}
-instead.
+instead.  To disable this completion, customize the variable
+@code{text-mode-ispell-word-completion} to the @code{nil} value.
 
 @vindex text-mode-hook
   Entering Text mode runs the mode hook @code{text-mode-hook}