Fix Language.name if subclass doesn't have __doc__.

src/robot/conf/languages.py

@@ -69,7 +69,7 @@ def _get_available_languages(self):
         for lang in Language.__subclasses__():
             available[normalize(lang.__name__)] = lang
             if lang.__doc__:
-                available[normalize(lang.__doc__)] = lang
+                available[normalize(lang.__doc__.splitlines()[0])] = lang
         return available
 
     def _import_languages(self, lang):
@@ -141,10 +141,11 @@ def from_name(cls, name):
         Raises `ValueError` if no matching langauge is found.
         """
         normalized = normalize(name, ignore='-')
-        for subcls in cls.__subclasses__():
-            if normalized in (normalize(subcls.__name__),
-                              normalize(getdoc(subcls))):
-                return subcls()
+        for lang in cls.__subclasses__():
+            if normalized == normalize(lang.__name__):
+                return lang()
+            if lang.__doc__ and normalized == normalize(lang.__doc__.splitlines()[0]):
+                return lang()
         raise ValueError(f"No language with name '{name}' found.")
 
     @property
@@ -166,7 +167,7 @@ def name(self):
 
         Got from the first line of the class docstring.
         """
-        return getdoc(self).splitlines()[0]
+        return self.__doc__.splitlines()[0] if self.__doc__ else ''
 
     @property
     def settings(self):

utest/api/test_languages.py

@@ -25,6 +25,12 @@ class X(Language):
             """
         assert_equal(X().name, 'Language Name')
 
+    def test_name_without_docstring(self):
+        class X(Language):
+            pass
+        X.__doc__ = None
+        assert_equal(X().name, '')
+
 
 class TestFromName(unittest.TestCase):