Merge branch '1.8'

CHANGES

@@ -227,6 +227,7 @@ Bugs fixed
 * #5966: mathjax has not been loaded on incremental build
 * #5960: LaTeX: modified PDF layout since September 2018 TeXLive update of
   :file:`parskip.sty`
+* #5958: versionadded directive causes crash with Python 3.5.0
 
 Testing
 --------

sphinx/domains/changeset.py

@@ -8,7 +8,8 @@
     :license: BSD, see LICENSE for details.
 """
 
-from typing import NamedTuple, cast
+from collections import namedtuple
+from typing import cast
 
 from docutils import nodes
 
@@ -48,12 +49,9 @@ locale.versionlabels = DeprecatedDict(
 )
 
 
-ChangeSet = NamedTuple('ChangeSet', [('type', str),
+# TODO: move to typing.NamedTuple after dropping py35 support (see #5958)
-                                     ('docname', str),
+ChangeSet = namedtuple('ChangeSet',
-                                     ('lineno', int),
+                       ['type', 'docname', 'lineno', 'module', 'descname', 'content'])
-                                     ('module', str),
-                                     ('descname', str),
-                                     ('content', str)])
 
 
 class VersionChange(SphinxDirective):

tests/test_intl.py

@@ -58,6 +58,8 @@ def build_mo():
                 if not mo.parent.exists():
                     mo.parent.makedirs()
 
+                if not mo.exists() or mo.stat().st_mtime < po.stat().st_mtime:
+                    # compile .mo file only if needed
                     write_mo(mo, read_po(po))
     return builder