[PATCH 3/3] Rename git-diff-tree-helper to git-diff-helper (part 2).

It used to be that diff-tree needed helper support to parse its
raw output to generate diffs, but these days git-diff-* family
produces the same output and the helper is not tied to diff-tree
anymore.  Drop "tree" from its name.

This follows the "rename only" commit to adjust the contents of
the files involved.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Petr Baudis <pasky@ucw.cz>

Documentation/git-diff-helper.txt

@@ -1,15 +1,15 @@
-git-diff-tree-helper(1)
+git-diff-helper(1)
 =======================
 v0.1, May 2005
 
 NAME
 ----
-git-diff-tree-helper - Generates patch format output for git-diff-*
+git-diff-helper - Generates patch format output for git-diff-*
 
 
 SYNOPSIS
 --------
-'git-diff-tree-helper' [-z] [-R]
+'git-diff-helper' [-z] [-R]
 
 DESCRIPTION
 -----------
@@ -26,8 +26,8 @@ OPTIONS
 	"git-diff-cache" which always compares tree with cache or working
 	file.  E.g.
 
-		git-diff-cache <tree> | git-diff-tree-helper -R file.c
-+
+		git-diff-cache <tree> | git-diff-helper -R file.c
+
 would show a diff to bring the working file back to what is in the <tree>.
 
 See Also

diff-helper.c

@@ -45,8 +45,8 @@ static int parse_oneside_change(const char *cp, struct diff_spec *one,
 	return 0;
 }
 
-static int parse_diff_tree_output(const char *buf,
-				  const char **spec, int cnt, int reverse)
+static int parse_diff_raw_output(const char *buf,
+				 const char **spec, int cnt, int reverse)
 {
 	struct diff_spec old, new;
 	char path[PATH_MAX];
@@ -109,8 +109,8 @@ static int parse_diff_tree_output(const char *buf,
 	return 0;
 }
 
-static const char *diff_tree_helper_usage =
-"diff-tree-helper [-R] [-z] paths...";
+static const char *diff_helper_usage =
+"git-diff-helper [-R] [-z] paths...";
 
 int main(int ac, const char **av) {
 	struct strbuf sb;
@@ -125,7 +125,7 @@ int main(int ac, const char **av) {
 		else if (av[1][1] == 'z')
 			line_termination = 0;
 		else
-			usage(diff_tree_helper_usage);
+			usage(diff_helper_usage);
 		ac--; av++;
 	}
 	/* the remaining parameters are paths patterns */
@@ -135,7 +135,7 @@ int main(int ac, const char **av) {
 		read_line(&sb, stdin, line_termination);
 		if (sb.eof)
 			break;
-		status = parse_diff_tree_output(sb.buf, av+1, ac-1, reverse);
+		status = parse_diff_raw_output(sb.buf, av+1, ac-1, reverse);
 		if (status)
 			fprintf(stderr, "cannot parse %s\n", sb.buf);
 	}