Documentation: clarify -u<mode> option defaults

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-commit.txt

@@ -214,10 +214,11 @@ FROM UPSTREAM REBASE" section in linkgit:git-rebase[1].)
 
 -u[<mode>]::
 --untracked-files[=<mode>]::
-	Show untracked files (Default: 'all').
+	Show untracked files.
 +
-The mode parameter is optional, and is used to specify
+The mode parameter is optional (defaults to 'all'), and is used to
-the handling of untracked files.
+specify the handling of untracked files; when -u is not used, the
+default is 'normal', i.e. show untracked files and directories.
 +
 The possible options are:
 +
@@ -225,9 +226,8 @@ The possible options are:
 	- 'normal' - Shows untracked files and directories
 	- 'all'    - Also shows individual files in untracked directories.
 +
-See linkgit:git-config[1] for configuration variable
+The default can be changed using the status.showUntrackedFiles
-used to change the default for when the option is not
+configuration variable documented in linkgit:git-config[1].
-specified.
 
 -v::
 --verbose::

Documentation/git-status.txt

@@ -38,20 +38,20 @@ OPTIONS
 
 -u[<mode>]::
 --untracked-files[=<mode>]::
-	Show untracked files (Default: 'all').
+	Show untracked files.
 +
-The mode parameter is optional, and is used to specify
+The mode parameter is optional (defaults to 'all'), and is used to
-the handling of untracked files. The possible options are:
+specify the handling of untracked files; when -u is not used, the
+default is 'normal', i.e. show untracked files and directories.
++
+The possible options are:
 +
---
 	- 'no'     - Show no untracked files
 	- 'normal' - Shows untracked files and directories
 	- 'all'    - Also shows individual files in untracked directories.
---
 +
-See linkgit:git-config[1] for configuration variable
+The default can be changed using the status.showUntrackedFiles
-used to change the default for when the option is not
+configuration variable documented in linkgit:git-config[1].
-specified.
 
 --ignore-submodules[=<when>]::
 	Ignore changes to submodules when looking for changes. <when> can be