emacs-27 98e8241: Document the 'flex' completion style

[Eli Zaretskii]

branch: emacs-27
commit 98e824199263d4f47200bb3cf60226c5125d700b
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Document the 'flex' completion style
    
    * doc/emacs/mini.texi (Completion Styles): Document the 'flex'
    completion style.  (Bug#42763)
---
 doc/emacs/mini.texi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc/emacs/mini.texi b/doc/emacs/mini.texi
index 55e41e3..54f046a 100644
--- a/doc/emacs/mini.texi
+++ b/doc/emacs/mini.texi
@@ -518,6 +518,13 @@ between @samp{foo} and @samp{bar}, that matches
 @samp{@var{a}foo@var{b}bar@var{c}}, where @var{a}, @var{b}, and
 @var{c} can be any string including the empty string.
 
+@item flex
+@cindex @code{flex}, completion style
+This aggressive completion style, also known as @code{flx} or
+@code{fuzzy} or @code{scatter} completion, attempts to complete using
+in-order substrings.  For example, it can consider @samp{foo} to match
+@samp{frodo} or @samp{fbarbazoo}.
+
 @item initials
 @cindex @code{initials}, completion style
 This very aggressive completion style attempts to complete acronyms