wrap git's main usage string.

It's now similar wrapped the same way as in Documentation/git.txt, and
fits in a 67 characters wide terminal.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git.c

@@ -5,7 +5,10 @@
 #include "run-command.h"
 
 const char git_usage_string[] =
-	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]";
+	"git [--version] [--exec-path[=GIT_EXEC_PATH]] [--html-path]\n"
+	"           [-p|--paginate|--no-pager]\n"
+	"           [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE]\n"
+	"           [--help] COMMAND [ARGS]";
 
 const char git_more_info_string[] =
 	"See 'git help COMMAND' for more information on a specific command.";