fix sphinx warnings

bob/bio/video/annotator/Base.py

@@ -9,7 +9,7 @@ class Base(bob.bio.base.annotator.Annotator):
   ----------
   frame_selector : :any:`bob.bio.video.FrameSelector`
     A frame selector class to define, which frames of the video to use.
-  read_original_data : callable
+  read_original_data : ``callable``
     A function with the signature of
     ``data = read_original_data(biofile, directory, extension)``
     that will be used to load the data from biofiles. By default the

bob/bio/video/annotator/FailSafeVideo.py

@@ -28,7 +28,7 @@ class FailSafeVideo(Base):
       The maximum number of frames that an annotation is valid for next frames.
       This value should be positive. If you want to set max_age to infinite,
       then you can use the :any:`bob.bio.video.annotator.Wrapper` instead.
-  validator : callable
+  validator : ``callable``
       A function that takes the annotations of a frame and validates it.
 
 

bob/bio/video/annotator/__init__.py

@@ -10,7 +10,7 @@ def normalize_annotations(annotations, validator, max_age=-1):
       strings (starting from 0). The inside dicts contain annotations for that
       frame. The dictionary needs to be an ordered dict in order for this to
       work.
-  validator : callable
+  validator : ``callable``
       Takes a dict (annotations) and returns True if the annotations are valid.
       This can be a check based on minimal face size for example: see
       :any:`bob.bio.face.annotator.min_face_size_validator`.