Merge branch 'rr/shortlog-doc'

Update documentation for "log" and "shortlog".

* rr/shortlog-doc:
  builtin/shortlog.c: make usage string consistent with log
  builtin/log.c: make usage string consistent with doc
  git-shortlog.txt: make SYNOPSIS match log, update OPTIONS
  git-log.txt: rewrite note on why "--" may be required
  git-log.txt: generalize <since>..<until>
  git-log.txt: order OPTIONS properly; move <since>..<until>
  revisions.txt: clarify the .. and ... syntax
  git-shortlog.txt: remove (-h|--help) from OPTIONS

builtin/log.c

@@ -37,7 +37,7 @@ static const char *fmt_patch_subject_prefix = "PATCH";
 static const char *fmt_pretty;
 
 static const char * const builtin_log_usage[] = {
-	N_("git log [<options>] [<since>..<until>] [[--] <path>...]\n")
+	N_("git log [<options>] [<revision range>] [[--] <path>...]\n")
 	N_("   or: git show [options] <object>..."),
 	NULL
 };