fix: autofix comments missing space after hash

.pre-commit-config.yaml

@@ -135,6 +135,7 @@ repos:
         exclude: >
           (?x)^(
             examples/playbooks/templates/.*|
+            examples/playbooks/transform-yaml-comments.yml|
             examples/yamllint/.*|
             examples/other/some.j2.yaml|
             examples/playbooks/collections/.*|

examples/playbooks/transform-yaml-comments.transformed.yml

@@ -0,0 +1,8 @@
+---
+# comment without space
+- name: Fixture
+  hosts: localhost
+  tasks:
+    - name: Task
+      ansible.builtin.debug:
+        msg: hello # inline without space

examples/playbooks/transform-yaml-comments.yml

@@ -0,0 +1,8 @@
+---
+#comment without space
+- name: Fixture
+  hosts: localhost
+  tasks:
+    - name: Task
+      ansible.builtin.debug:
+        msg: hello #inline without space

src/ansiblelint/rules/yaml_rule.py

@@ -104,9 +104,8 @@ def transform(
         :param lintable: Lintable instance
         :param data: data to transform
         """
-        # This method does nothing because the YAML reformatting is implemented
-        # in data dumper. Still presence of this method helps us with
-        # documentation generation.
+        if match.tag == "yaml[comments]":
+            match.fixed = True
 
 
 # testing code to be loaded only with pytest or when executed the rule file

src/ansiblelint/yaml_utils.py

@@ -824,6 +824,11 @@ def write_comment(
         else:
             # single blank lines in post comments
             value = self._re_repeat_blank_lines.sub("\n\n", value)
+
+        # make sure that comments have a space after #
+        if value.startswith("#") and not value.startswith("# ") and len(value) > 1:
+            value = "# " + value[1:]
+
         comment.value = value
 
         # make sure that the eol comment only has one space before it.

test/test_transformer.py

@@ -212,6 +212,13 @@ def fixture_runner_result(
             True,
             id="name-capitalize",
         ),
+        pytest.param(
+            "examples/playbooks/transform-yaml-comments.yml",
+            2,
+            True,
+            True,
+            id="yaml-comments",
+        ),
     ),
 )
 @mock.patch.dict(os.environ, {"ANSIBLE_LINT_WRITE_TMP": "1"}, clear=True)