Remove D413 from the google convention

As none of the examples in the
[Google Python Style Guide](https://google.github.io/styleguide/pyguide.html)
show a docstring with an extra blank line at the end (see the
[3.8.1 Docstrings](https://google.github.io/styleguide/pyguide.html#381-docstrings)
section in particular), error D413 should be excluded from the default
"google" convention.

See PyCQA#429 for a test case with examples from the Google Python Style
Guide; see also PyCQA#401 for D413 in relation to the "pep257" convention.

docs/error_codes.rst

@@ -21,7 +21,7 @@ The numpy convention checks for all of the above errors except for
 D107, D203, D212, D213, D402, D413, D415, D416 and D417.
 
 The google convention checks for all of the above errors except for
-D203, D204, D213, D215, D400, D401, D404, D406, D407, D408 and D409.
+D203, D204, D213, D215, D400, D401, D404, D406, D407, D408, D409 and D413.
 
 These conventions may be specified using `--convention=<name>` when
 running pydocstyle from the command line or by specifying the

docs/release_notes.rst

@@ -22,6 +22,7 @@ New Features
 
 Bug Fixes
 
+* Remove D413 from the google convention (#430).
 * Remove D413 from the pep257 convention (#404).
 * Replace `semicolon` with `colon` in D416 messages. (#409)
 * D301 (Use r""" if any backslashes in a docstring) does not trigger on

src/pydocstyle/violations.py

@@ -270,5 +270,5 @@ def __getattr__(self, item: str) -> Any:
     'numpy': all_errors - {'D107', 'D203', 'D212', 'D213', 'D402', 'D413',
                            'D415', 'D416', 'D417'},
     'google': all_errors - {'D203', 'D204', 'D213', 'D215', 'D400', 'D401',
-                            'D404', 'D406', 'D407', 'D408', 'D409'}
+                            'D404', 'D406', 'D407', 'D408', 'D409', 'D413'}
 })

src/tests/test_integration.py

@@ -650,7 +650,7 @@ def __init__(self):
     assert 'D409' not in out
     assert 'D410' not in out
     assert 'D412' in out
-    assert 'D413' in out
+    assert 'D413' not in out
     assert 'D414' in out
     assert 'D417' in out