Merge pull request scikit-learn#5771 from bhargav/minor-doc-fixes

DOC - Minor documentation fixes - Fixes scikit-learn#5770 and scikit-learn#5761

Author: GaelVaroquaux

doc/modules/cross_validation.rst

@@ -405,8 +405,8 @@ for cross-validation against time-based splits.
 
 .. warning::
 
-  Contrary to :class:`StratifiedKFold`, **the ``labels`` of
-  :class:`LeaveOneLabelOut` should not encode the target class to predict**:
+  Contrary to :class:`StratifiedKFold`, the ``labels`` of
+  :class:`LeaveOneLabelOut` should not encode the target class to predict:
   the goal of :class:`StratifiedKFold` is to rebalance dataset classes across
   the train / test split to ensure that the train and test folds have
   approximately the same percentage of samples of each class while

doc/themes/scikit-learn/layout.html

@@ -76,7 +76,7 @@
             <li><a href="{{ pathto('user_guide') }}">User guide</a></li>
             <li><a href="{{ pathto('modules/classes') }}">API</a></li>
             <li><a href="{{ pathto('faq') }}">FAQ</a></li>
-            <li><a href="{{ pathto('developers') }}">Contributing</a></li>
+            <li><a href="{{ pathto('developers/index') }}">Contributing</a></li>
             <li class="divider"></li>
                 <li><a href="http://scikit-learn.org/stable/documentation.html">Scikit-learn 0.16.1 (stable)</a></li>
                 <li><a href="http://scikit-learn.org/0.15/documentation.html">Scikit-learn 0.15</a></li>