typo

(#218)

Author: rmandelb

galsim/base.py

@@ -277,7 +277,7 @@ def copy(self):
         NB. This is a shallow copy, which is normally fine.  However, if the object has a noise
         attribute, then the copy will use the same rng, so calls to things like noise.whitenImage
         from the two copies would produce different realizations of the noise.  If you want 
-        these to be precisely idendical, then copy.deepcopy will make an exact duplicate, which
+        these to be precisely identical, then copy.deepcopy will make an exact duplicate, which
         will have identical noise realizations for that kind of application.
         """
         import copy