Update docstrings

spacy/displacy/__init__.py

@@ -18,7 +18,7 @@ def render(docs, style='dep', page=False, minify=False, jupyter=False, options={
     minify (bool): Minify HTML markup.
     jupyter (bool): Experimental, use Jupyter's display() to output markup.
     options (dict): Visualiser-specific options, e.g. colors.
-    RETURNS: Rendered HTML markup.
+    RETURNS (unicode): Rendered HTML markup.
     """
     if isinstance(docs, Doc):
         docs = [docs]

spacy/displacy/render.py

@@ -190,6 +190,7 @@ class EntityRenderer(object):
 
         text (unicode): Original text.
         spans (list): Individual entity spans and their start, end and label.
+        title (unicode or None): Document title set in Doc.user_data['title'].
         """
         markup = ''
         offset = 0