Merging upstream version 0.18.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

qa/expected/test_config/test_config_from_env_1

@@ -14,11 +14,13 @@ contrib: ['CC1', 'CT1']
 ignore: T1,T2
 ignore-merge-commits: True
 ignore-fixup-commits: True
+ignore-fixup-amend-commits: True
 ignore-squash-commits: True
 ignore-revert-commits: True
 ignore-stdin: True
 staged: False
 fail-without-commits: True
+regex-style-search: False
 verbosity: 2
 debug: True
 target: {target}
@@ -60,7 +62,7 @@ target: {target}
   B8: body-match-regex
      regex=None
   M1: author-valid-email
-     regex=[^@ ]+@[^@ ]+\.[^@ ]+
+     regex=^[^@ ]+@[^@ ]+\.[^@ ]+
   CC1: contrib-body-requires-signed-off-by
   CT1: contrib-title-conventional-commits
      types=fix,feat,chore,docs,style,refactor,perf,test,revert,ci,build
@@ -71,8 +73,8 @@ DEBUG: gitlint.cli Linting 1 commit(s)
 DEBUG: gitlint.git ('log', '{commit_sha}', '-1', '--pretty=%aN%x00%aE%x00%ai%x00%P%n%B')
 DEBUG: gitlint.git ('config', '--get', 'core.commentchar')
 DEBUG: gitlint.lint Linting commit {commit_sha}
+DEBUG: gitlint.git ('diff-tree', '--no-commit-id', '--numstat', '-r', '--root', '{commit_sha}')
 DEBUG: gitlint.git ('branch', '--contains', '{commit_sha}')
-DEBUG: gitlint.git ('diff-tree', '--no-commit-id', '--name-only', '-r', '--root', '{commit_sha}')
 DEBUG: gitlint.lint Commit Object
 --- Commit Message ----
 WIP: Thïs is a title thåt is a bit longer.
@@ -84,10 +86,14 @@ Author: gitlint-test-user <gitlint@test.com>
 Date:   {commit_date}
 is-merge-commit:  False
 is-fixup-commit:  False
+is-fixup-amend-commit: False
 is-squash-commit: False
 is-revert-commit: False
-Branches: ['master']
+Parents: []
+Branches: ['main']
 Changed Files: {changed_files}
+Changed Files Stats:
+  {changed_files_stats}
 -----------------------
 1: CC1 Body does not contain a 'Signed-off-by' line
 1: CT1 Title does not start with one of fix, feat, chore, docs, style, refactor, perf, test, revert, ci, build