minor grammar fixes (from docs@python.org)
diff --git a/Doc/tutorial/classes.rst b/Doc/tutorial/classes.rst
index 8970a66..d82adf6 100644
--- a/Doc/tutorial/classes.rst
+++ b/Doc/tutorial/classes.rst
@@ -826,7 +826,7 @@
:term:`Generator`\s are a simple and powerful tool for creating iterators. They
are written like regular functions but use the :keyword:`yield` statement
whenever they want to return data. Each time :func:`next` is called on it, the
-generator resumes where it left-off (it remembers all the data values and which
+generator resumes where it left off (it remembers all the data values and which
statement was last executed). An example shows that generators can be trivially
easy to create::
@@ -844,7 +844,7 @@
o
g
-Anything that can be done with generators can also be done with class based
+Anything that can be done with generators can also be done with class-based
iterators as described in the previous section. What makes generators so
compact is that the :meth:`__iter__` and :meth:`~generator.next` methods
are created automatically.