minor fix

theano/configdefaults.py

@@ -1477,18 +1477,15 @@ AddConfigVar('compile.wait',
              """Time to wait before retrying to aquire the compile lock.""",
              IntParam(5, lambda i: i > 0, allow_override=False),
              in_c_key=False)
-"""
-If cycle_detection is set to regular, most inplaces are allowed,
-but it is slower. If cycle_detection is set to faster,
-less inplaces are allowed, but it makes the compilation faster.
 
-The interaction of which one give the lower peak memory usage is complicated and
-not predictable, so if you are close to the peak memory usage, triyng both
-could give you a small gain.
-"""
 AddConfigVar('cycle_detection',
-             """If true it disables the cycle detection in graph.
-             """,
+             "If cycle_detection is set to regular, most inplaces are allowed,"
+             "but it is slower. If cycle_detection is set to faster, less inplaces"
+             "are allowed, but it makes the compilation faster."
+
+             "The interaction of which one give the lower peak memory usage is"
+             "complicated and not predictable, so if you are close to the peak"
+             "memory usage, triyng both could give you a small gain. ",
              EnumStr('regular', 'fast'),
              in_c_key=False)
 

theano/gof/fg.py

@@ -675,7 +675,7 @@ class FunctionGraph(utils.object2):
                                 " will be non-deterministic.")
         if len(all_orderings) == 1:
             # If there is only 1 ordering, we reuse it directly.
-            return all_orderings[0]
+            return all_orderings[0].copy()
         else:
             # If there is more than 1 ordering, combine them.
             ords = OrderedDict()