commit 51ed7429eaf94d2ab0dfa3f248549b2279c7e5d6
from: Stefan Sperling <stsp@stsp.name>
date: Sun Oct 10 15:24:21 2021 UTC

align 'diff -c' usage help with synopsis given in man page; suggested by naddy

commit - 67b631c9e0d2c43ceeda1a387ba696b2d34a1035
commit + 51ed7429eaf94d2ab0dfa3f248549b2279c7e5d6
blob - 8449c3c11215dcdfed0b9895f61a62a523ab4aad
blob + 323461bc8c40befe6cb69f4cab726725833fff59
--- got/got.c
+++ got/got.c
@@ -4276,9 +4276,9 @@ done:
 __dead static void
 usage_diff(void)
 {
-	fprintf(stderr, "usage: %s diff [-a] [-c commit1] [-c commit2] "
-	    "[-C number] [-r repository-path] "
-	    "[-s] [-w] [-P] [object1 object2 | path ...]\n", getprogname());
+	fprintf(stderr, "usage: %s diff [-a] [-c commit] [-C number] "
+	    "[-r repository-path] [-s] [-w] [-P] "
+	    "[object1 object2 | path ...]\n", getprogname());
 	exit(1);
 }