DOC: fix ReST markup error in get_data docstring

Author: matthew-brett

nibabel/spatialimages.py

@@ -459,7 +459,7 @@ def get_data(self, caching='fill'):
         The default behavior for ``get_data()`` on a proxy image is to read the
         data from the proxy, and store in an internal cache.  Future calls to
         ``get_data`` will return the cached array.  This is the behavior
-        selected with `caching` == "fill"`.
+        selected with `caching` == "fill".
 
         Once the data has been cached and returned from an array proxy, if you
         modify the returned array, you will also modify the cached array