Merge branch 'sb/format-patch-patchname'

* sb/format-patch-patchname: format_sanitized_subject: Don't trim past initial length of strbuf log-tree: fix patch filename computation in "git format-patch" format-patch: --numbered-files and --stdout aren't mutually exclusive format-patch: --attach/inline uses filename instead of SHA1 format-patch: move get_patch_filename() into log-tree format-patch: pass a commit to reopen_stdout() format-patch: construct patch filename in one function pretty.c: add %f format specifier to format_commit_message()