ls-files --full-name: usage string and documentation.

Somehow this option was not mentioned anywhere in the
documentation nor the usage string.

Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/git-ls-files.txt

@@ -13,7 +13,8 @@ SYNOPSIS
 		(-[c|d|o|i|s|u|k|m])\*
 		[-x <pattern>|--exclude=<pattern>]
 		[-X <file>|--exclude-from=<file>]
-		[--exclude-per-directory=<file>] [--] [<file>]\*
+		[--exclude-per-directory=<file>] 
+		[--full-name] [--] [<file>]\*
 
 DESCRIPTION
 -----------
@@ -77,6 +78,12 @@ OPTIONS
 	K::	to be killed
 	?	other
 
+--full-name::
+	When run from a subdirectory, the command usually
+	outputs paths relative to the current directory.  This
+	option forces paths to be output relative to the project
+	top directory.
+
 --::
 	Do not interpret any more arguments as options.
 

ls-files.c

@@ -562,7 +562,7 @@ static void verify_pathspec(void)
 static const char ls_files_usage[] =
 	"git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
 	"[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
-	"[ --exclude-per-directory=<filename> ] [--] [<file>]*";
+	"[ --exclude-per-directory=<filename> ] [--full-name] [--] [<file>]*";
 
 int main(int argc, const char **argv)
 {