Fix Field.getDoc() when value_type or key_type are presentissue76

Fixes #76

3 files changed, 31 insertions, 0 deletions

diff --git a/CHANGES.rst b/CHANGES.rst
index a861314..d50182e 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -7,6 +7,9 @@
 
 - Nothing changed yet.
 
+- Fix ``Field.getDoc()`` when ``value_type`` or ``key_type`` is
+  present. Previously it could produce ReST that generated Sphinx
+  warnings. See `issue 76 <https://github.com/zopefoundation/zope.schema/issues/76>`_.
 
 4.8.0 (2018-09-19)
 ==================
diff --git a/src/zope/schema/_bootstrapfields.py b/src/zope/schema/_bootstrapfields.py
index 0ba053f..6aa778b 100644
--- a/src/zope/schema/_bootstrapfields.py
+++ b/src/zope/schema/_bootstrapfields.py
@@ -397,6 +397,7 @@ class Field(Attribute):
                              ('value_type', 'Value Type')):
             field = getattr(self, name, None)
             if hasattr(field, 'getDoc'):
+                lines.append("")
                 lines.append(".. rubric:: " + rubric)
                 lines.append(field.getDoc())
 
diff --git a/src/zope/schema/tests/test__bootstrapfields.py b/src/zope/schema/tests/test__bootstrapfields.py
index c8bb2b0..021377e 100644
--- a/src/zope/schema/tests/test__bootstrapfields.py
+++ b/src/zope/schema/tests/test__bootstrapfields.py
@@ -420,6 +420,33 @@ class FieldTests(EqualityTestsMixin,
         self.assertIn('.. rubric:: Key Type', doc)
         self.assertIn('.. rubric:: Value Type', doc)
 
+        self.assertEqual(
+            field.getDoc(),
+            textwrap.dedent("""
+            :Implementation: :class:`zope.schema.Field`
+            :Read Only: True
+            :Required: False
+            :Default Factory: 'default'
+            :Allowed Type: :class:`str`, :class:`object`
+
+            .. rubric:: Key Type
+
+            :Implementation: :class:`zope.schema.Field`
+            :Read Only: False
+            :Required: True
+            :Default Value: None
+
+
+            .. rubric:: Value Type
+
+            :Implementation: :class:`zope.schema.Field`
+            :Read Only: False
+            :Required: True
+            :Default Value: None
+
+            """)
+        )
+
         field = self._makeOne(title=u'A title', description=u"""Multiline description.
 
         Some lines have leading whitespace.