git-repack: update usage to match docs

This also adds the '--full-name-hash' option introduced in the previous
change and adds newlines to the synopsis.

Signed-off-by: Derrick Stolee <[email protected]>

Author: derrickstolee

Documentation/git-repack.txt

@@ -11,7 +11,7 @@ SYNOPSIS
 [verse]
 'git repack' [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [-b] [-m]
 	[--window=<n>] [--depth=<n>] [--threads=<n>] [--keep-pack=<pack-name>]
-	[--write-midx] [--path-walk]
+	[--write-midx] [--path-walk] [--full-name-hash]
 
 DESCRIPTION
 -----------

builtin/repack.c

@@ -41,7 +41,7 @@ static char *packdir, *packtmp_name, *packtmp;
 static const char *const git_repack_usage[] = {
 	N_("git repack [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [-b] [-m]\n"
 	   "[--window=<n>] [--depth=<n>] [--threads=<n>] [--keep-pack=<pack-name>]\n"
-	   "[--write-midx] [--path-walk]"),
+	   "[--write-midx] [--path-walk] [--full-name-hash]"),
 	NULL
 };