ext.napoleon: Do not consume colons within inline code

Fixes gh-7581

tests/test_ext_napoleon_docstring.py

@@ -78,15 +78,17 @@ class InlineAttributeTest(BaseDocstringTest):
 
     def test_class_data_member(self):
         config = Config()
-        docstring = """data member description:
+        docstring = dedent("""\
+        data member description:
 
-- a: b
-"""
+        - a: b
+        """)
         actual = str(GoogleDocstring(docstring, config=config, app=None,
                      what='attribute', name='some_data', obj=0))
-        expected = """data member description:
+        expected = dedent("""\
+        data member description:
 
-- a: b"""
+        - a: b""")
 
         self.assertEqual(expected, actual)
 
@@ -95,10 +97,30 @@ class InlineAttributeTest(BaseDocstringTest):
         docstring = """b: data member description with :ref:`reference`"""
         actual = str(GoogleDocstring(docstring, config=config, app=None,
                      what='attribute', name='some_data', obj=0))
-        expected = """data member description with :ref:`reference`
+        expected = dedent("""\
+        data member description with :ref:`reference`
 
-:type: b"""
+        :type: b""")
+        self.assertEqual(expected, actual)
 
+    def test_class_data_member_inline_no_type(self):
+        config = Config()
+        docstring = """data with ``a : in code`` and :ref:`reference` and no type"""
+        actual = str(GoogleDocstring(docstring, config=config, app=None,
+                     what='attribute', name='some_data', obj=0))
+        expected = """data with ``a : in code`` and :ref:`reference` and no type"""
+
+        self.assertEqual(expected, actual)
+
+    def test_class_data_member_inline_ref_in_type(self):
+        config = Config()
+        docstring = """:class:`int`: data member description"""
+        actual = str(GoogleDocstring(docstring, config=config, app=None,
+                     what='attribute', name='some_data', obj=0))
+        expected = dedent("""\
+        data member description
+
+        :type: :class:`int`""")
         self.assertEqual(expected, actual)