Clean-ups

2 files changed, 7 insertions, 3 deletions

diff --git a/coverage/backward.py b/coverage/backward.py
index af6da629..e901d84f 100644
--- a/coverage/backward.py
+++ b/coverage/backward.py
@@ -81,19 +81,23 @@ except AttributeError:
         """Open a source file the best way."""
         return open(fname, "rU")
 
-# Python 3.x is picky about bytes and strings, so provide methods to 
+# Python 3.x is picky about bytes and strings, so provide methods to
 # get them right, and make them no-ops in 2.x
 if sys.version_info >= (3, 0):
     def to_bytes(s):
+        """Convert string `s` to bytes."""
         return s.encode('utf8')
 
     def to_string(b):
+        """Convert bytes `b` to a string."""
         return b.decode('utf8')
 
 else:
     def to_bytes(s):
+        """Convert string `s` to bytes (no-op in 2.x)."""
         return s
 
     def to_string(b):
+        """Convert bytes `b` to a string (no-op in 2.x)."""
         return b
 
diff --git a/coverage/control.py b/coverage/control.py
index 514f23d9..3369d04e 100644
--- a/coverage/control.py
+++ b/coverage/control.py
@@ -226,8 +226,8 @@ class coverage(object):
         self._check_for_packages()
 
         # Compiled Python files have two filenames: frame.f_code.co_filename is
-        # the filename at the time the .pyc was compiled.  The second name
-        # is __file__, which is where the .pyc was actually loaded from.  Since
+        # the filename at the time the .pyc was compiled.  The second name is
+        # __file__, which is where the .pyc was actually loaded from.  Since
         # .pyc files can be moved after compilation (for example, by being
         # installed), we look for __file__ in the frame and prefer it to the
         # co_filename value.