[PATCH v2 0/3] repo: add -z as an alias for --format=nul to git-repo-structure

Hi!

The main objective of this patchset is to add -z to git-repo-structure as an alias for --format=nul. I'm including two other related patches here:

- a patch removing an extra line in the documentation, which was leaking an + to
  the generated files

- a patch replacing `[--format=...] [-z]` by `[--format=... | -z]` in
  git-repo-info's synopsis

Lucas Seiki Oshiro (3):
  repo: remove blank line from Documentation/git-repo.adoc
  repo: use [--format=... | -z] instead of [-z] in git-repo-info
    synopsis
  repo: add -z as an alias for --format=nul to git-repo-structure

 Documentation/git-repo.adoc | 11 ++++++-----
 builtin/repo.c              |  8 ++++++--
 t/t1901-repo-structure.sh   |  7 +++++++
 3 files changed, 19 insertions(+), 7 deletions(-)

Range-diff against v1:
-:  ---------- > 1:  bfd4ff5db0 repo: remove blank line from Documentation/git-repo.adoc
-:  ---------- > 2:  e5eac8713c repo: use [--format=... | -z] instead of [-z] in git-repo-info synopsis
1:  f051cd41de ! 3:  0ccec7037d repo: add -z as an alias for --format=nul to git-repo-structure
    @@ Documentation/git-repo.adoc
     @@ Documentation/git-repo.adoc: SYNOPSIS
      --------
      [synopsis]
    - git repo info [--format=(keyvalue|nul)] [-z] [--all | <key>...]
    + git repo info [--format=(keyvalue|nul) | -z] [--all | <key>...]
     -git repo structure [--format=(table|keyvalue|nul)]
    -+git repo structure [--format=(table|keyvalue|nul)] [-z]
    ++git repo structure [--format=(table|keyvalue|nul) | -z]
      
      DESCRIPTION
      -----------
    @@ Documentation/git-repo.adoc: supported:
      `-z` is an alias for `--format=nul`.
      
     -`structure [--format=(table|keyvalue|nul)]`::
    -+`structure [--format=(table|keyvalue|nul)] [-z]`::
    ++`structure [--format=(table|keyvalue|nul) | -z]`::
      	Retrieve statistics about the current repository structure. The
      	following kinds of information are reported:
      +
    @@ Documentation/git-repo.adoc: supported:
      	the delimiter between the key and value instead of '='. Unlike the
      	`keyvalue` format, values containing "unusual" characters are never
      	quoted.
    +++
     +`-z` is an alias for `--format=nul`.
      
      INFO KEYS
    @@ builtin/repo.c
     @@
      
      static const char *const repo_usage[] = {
    - 	"git repo info [--format=(keyvalue|nul)] [-z] [--all | <key>...]",
    + 	"git repo info [--format=(keyvalue|nul) | -z] [--all | <key>...]",
     -	"git repo structure [--format=(table|keyvalue|nul)]",
    -+	"git repo structure [--format=(table|keyvalue|nul)] [-z]",
    ++	"git repo structure [--format=(table|keyvalue|nul) | -z]",
      	NULL
      };
      
    @@ t/t1901-repo-structure.sh: test_expect_success 'keyvalue and nul format' '
     +		test_cmp expect_nul out &&
     +		test_line_count = 0 err &&
     +
    -+		# Check -z
    -+		git repo structure --format=nul >out 2>err &&
    ++		# "-z", as a synonym to "--format=nul", participates in the
    ++		# usual "last one wins" rule.
    ++		git repo structure --format=table -z >out 2>err &&
     +
      		test_cmp expect_nul out &&
      		test_line_count = 0 err