Better error msg.

theano/compile/function.py

@@ -166,8 +166,11 @@ def function(inputs, outputs=None, mode=None, updates=None, givens=None,
 
     if isinstance(updates, dict) and \
             not isinstance(updates, gof.python25.OrderedDict):
-        warnings.warn("Expected OrderedDict, got "+str(type(updates))+ "Using "
-        "a standard dictionary here results in "
+        warnings.warn(
+            "The parameter 'updates' of theano.function()"
+            " expect an OrderedDict,"
+            " got " + str(type(updates)) + "Using "
+            "a standard dictionary here results in "
             "non-deterministic behavior. You should use an OrderedDict"
             " if you are using python2.7 or use a list of (shared, update)"
             " pairs. Do not just convert your dictionary to this type before"
@@ -176,7 +179,8 @@ def function(inputs, outputs=None, mode=None, updates=None, givens=None,
     if givens is None:
         givens = []
     if not isinstance(inputs, (list, tuple)):
-        raise Exception("Inputs variable of a Theano function should be contained in a list, even when there is a single input.")
+        raise Exception("Inputs variable of a Theano function should be"
+                        " contained in a list, even when there is a single input.")
 
     # compute some features of the arguments:
     uses_In = any([isinstance(i, In) for i in inputs])  # N.B. the square brackets are ncessary