Fixes grammar in docstring.

diff --git a/lib/sqlalchemy/ext/declarative/__init__.py b/lib/sqlalchemy/ext/declarative/__init__.py
index 1fb3feb6a522f1a2ddb3a2154cebe481581fc31b..2a0c95cbbaa739ede2455512137427f7d7aaeab8 100644 (file)
--- a/lib/sqlalchemy/ext/declarative/__init__.py
+++ b/lib/sqlalchemy/ext/declarative/__init__.py
@@ -901,7 +901,7 @@ reference a common target class via many-to-one::
 primaryjoin, order_by etc. expressions should use the string forms
 for these arguments, so that they are evaluated as late as possible.
 To reference the mixin class in these expressions, use the given ``cls``
-to get it's name::
+to get its name::
 
     class RefTargetMixin(object):
         @declared_attr