lock_file(): exit early if lockfile cannot be opened

diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
index 5c0a4ab2d6d4c123899fa32e8f147a8c077f2130..c0fd470da42991404c722f45ee7ac48cd774287b 100644 (file)
--- a/Documentation/git-format-patch.txt
+++ b/Documentation/git-format-patch.txt
@@ -14,6 +14,7 @@ SYNOPSIS
                   [(--attach|--inline)[=<boundary>] | --no-attach]
                   [-s | --signoff]
                   [--signature=<signature> | --no-signature]
+                  [--signature-file=<file>]
                   [-n | --numbered | -N | --no-numbered]
                   [--start-number <n>] [--numbered-files]
                   [--in-reply-to=Message-Id] [--suffix=.<sfx>]
@@ -233,6 +234,9 @@ configuration options in linkgit:git-notes[1] to use this workflow).
        signature option is omitted the signature defaults to the Git version
        number.
 
+--signature-file=<file>::
+       Works just like --signature except the signature is read from a file.
+
 --suffix=.<sfx>::
        Instead of using `.patch` as the suffix for generated
        filenames, use specified suffix.  A common alternative is