[PATCH v2] gitignore: rewrite wildcard description

[Junio C Hamano <gitster@pobox.com>]

The documentation for '.gitignore' makes reference to fnmatch(3) and
FNM_PATHNAME to describe how an asterisk "*" and a question mark "?"
behave.  Even though it spells out that these wildcard characters
do not match a slash, it does not say if an asterisk matches an
empty string (it does).

Rewrite the section so that the readers would get a more complete
picture without requiring them to know what fnmatch(3) and glob(7)
says.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 * let's adopt the most explicit "(including the empty string)"
   from glob(7).

 Documentation/gitignore.adoc | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/Documentation/gitignore.adoc b/Documentation/gitignore.adoc
index 7979e50f18..87f37c2b0c 100644
--- a/Documentation/gitignore.adoc
+++ b/Documentation/gitignore.adoc
@@ -110,11 +110,16 @@ PATTERN FORMAT
    and `a/frotz` that is a directory (all paths are relative from
    the `.gitignore` file).
 
- - An asterisk "`*`" matches anything except a slash.
-   The character "`?`" matches any one character except "`/`".
-   The range notation, e.g. `[a-zA-Z]`, can be used to match
-   one of the characters in a range. See fnmatch(3) and the
-   FNM_PATHNAME flag for a more detailed description.
+ - An asterisk "`*`" matches any string (including the empty string),
+   and a question mark "`?`" matches any single character, but these
+   wildcard characters do not match a slash "`/`".
+
+ - A pair of brackets that enclose characters match one of the listed
+   characters, and a range notation inside them, e.g., "`[a-zA-Z]`",
+   would behave as if all the characters in the range were listed there
+   instead.  Wildcard characters "`*`" and "`?`" lose their special
+   meaning inside a pair of brackets, e.g., "`[*]`" would match an
+   asterisk and nothing else.
 
  - A backslash ("`\`") can be used to escape any character. E.g., "`\*`"
    matches a literal asterisk (and "`\a`" matches "`a`", even though

Interdiff:
  diff --git a/Documentation/gitignore.adoc b/Documentation/gitignore.adoc
  index 671a5a4c99..87f37c2b0c 100644
  --- a/Documentation/gitignore.adoc
  +++ b/Documentation/gitignore.adoc
  @@ -110,9 +110,9 @@ PATTERN FORMAT
      and `a/frotz` that is a directory (all paths are relative from
      the `.gitignore` file).
   
  - - An asterisk "`*`" matches string of any length, and a question mark
  -   "`?`" matches any single character, but these wildcard characters
  -   do not match a slash "`/`".
  + - An asterisk "`*`" matches any string (including the empty string),
  +   and a question mark "`?`" matches any single character, but these
  +   wildcard characters do not match a slash "`/`".
   
    - A pair of brackets that enclose characters match one of the listed
      characters, and a range notation inside them, e.g., "`[a-zA-Z]`",
-- 
2.56.0-511-g14903f623d