Add space to separate comments from tokens

https://yaml.org/spec/1.2/spec.html#id2780069

borgmatic/config/generate.py

@@ -45,10 +45,10 @@ def _comment_out_line(line):
     # Comment out the names of optional sections.
     one_indent = ' ' * INDENT
     if not line.startswith(one_indent):
-        return '#' + line
+        return '# ' + line
 
     # Otherwise, comment out the line, but insert the "#" after the first indent for aesthetics.
-    return '#'.join((one_indent, line[INDENT:]))
+    return '# '.join((one_indent, line[INDENT:]))
 
 
 REQUIRED_KEYS = {'source_directories', 'repositories', 'keep_daily'}

tests/integration/config/test_generate.py

@@ -31,17 +31,17 @@ def test_comment_out_line_skips_already_commented_out_line():
 def test_comment_out_line_comments_section_name():
     line = 'figgy-pudding:'
 
-    assert module._comment_out_line(line) == '#' + line
+    assert module._comment_out_line(line) == '# ' + line
 
 
 def test_comment_out_line_comments_indented_option():
     line = '    enabled: true'
 
-    assert module._comment_out_line(line) == '    #enabled: true'
+    assert module._comment_out_line(line) == '    # enabled: true'
 
 
 def test_comment_out_optional_configuration_comments_optional_config_only():
-    flexmock(module)._comment_out_line = lambda line: '#' + line
+    flexmock(module)._comment_out_line = lambda line: '# ' + line
     config = '''
 foo:
     bar:
@@ -57,17 +57,17 @@ location:
     '''
 
     expected_config = '''
-#foo:
+# foo:
-#    bar:
+#     bar:
-#        - baz
+#         - baz
-#        - quux
+#         - quux
 # 
 location:
     repositories:
         - one
         - two
 # 
-#    other: thing
+#     other: thing
     '''
 
     assert module._comment_out_optional_configuration(config.strip()) == expected_config.strip()