Fix spelling in documentation

doc/library/scan.txt

@@ -138,7 +138,7 @@ Simple accumulation into a scalar, ditching lambda
 
 Although this example would seem almost self-explanatory, it stresses a
 pitfall to be careful of: the initial output state that is supplied, that is 
-``output_info``, must be of a **shape similar to that of the output variable**
+``outputs_info``, must be of a **shape similar to that of the output variable**
 generated at each iteration and moreover, it **must not involve an implicit
 downcast** of the latter. 
 

theano/sandbox/scan.py

@@ -503,7 +503,7 @@ def scan(fn,
     if as_while:
         tmp_dummy_f_outs -= 1
     if not (tmp_dummy_f_outs == n_outs or outs_info == []):
-        raise ValueError('Please provide None as output_info for '
+        raise ValueError('Please provide None as outputs_info for '
                          'any output that does not feed back into '
                          'scan (i.e. it behaves like a map) ')
 

theano/sandbox/scan_module/scan.py

@@ -97,7 +97,7 @@ def scan(fn,
 
         The order of the sequences is the same as the one in the list
         `sequences` given to scan. The order of the outputs is the same
-        as the order of ``output_info``. For any sequence or output the
+        as the order of ``outputs_info``. For any sequence or output the
         order of the time slices is the same as the one in which they have
         been given as taps. For example if one writes the following :