git.txt: list index versions in plain English

At the first look, a user may think the default version is "23". Even with UNIX background, there's no reference anywhere close that may indicate this is glob or regex. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Nguyễn Thái Ngọc Duy committed Mar 24, 2015 at 07:28 UTC 70320541ec8727fe57d0bb29a196edef71cae840
1 file changed +2 -1
Documentation/git.txt
+2 -1
@@ -739,7 +739,8 @@ Git so take care if using Cogito etc.
739 'GIT_INDEX_VERSION'::
740 This environment variable allows the specification of an index
741 version for new repositories. It won't affect existing index
742 - files. By default index file version [23] is used.
742 + files. By default index file version 2 or 3 is used. See
743 + linkgit:git-update-index[1] for more information.
744
745 'GIT_OBJECT_DIRECTORY'::
746 If the object storage directory is specified via this