Documentation: git-init: template directory: reword and cross-reference

Signed-off-by: NLinus Arver <linusarver@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/git-init.txt

@@ -129,9 +129,8 @@ The template directory will be one of the following (in order):
 
  - the default template directory: `/usr/share/git-core/templates`.
 
-The default template directory includes some directory structure, some
-suggested "exclude patterns", and copies of sample "hook" files.
-The suggested patterns and hook files are all modifiable and extensible.
+The default template directory includes some directory structure, suggested
+"exclude patterns" (see linkgit:gitignore[5]), and sample hook files (see linkgit:githooks[5]).
 
 EXAMPLES
 --------