better open hygiene

src/zope/testing/doctestcase.py

@@ -55,7 +55,7 @@ def test4(self):
   function.  The decorated function is run before the test is executed.
   This provides a way to provide some test-specfic setup, if desired.
 
-  Note that the docstring, of any, of the decorated function is ignored.
+  Note that the docstring, if any, of the decorated function is ignored.
 
 Also note that, unlike regular unit tests, module globals from the
 module defining the tests are't included in the test globals.
@@ -94,7 +94,8 @@ def __init__(self, test, optionflags=0, checker=None):
                     sys._getframe(2).f_globals['__file__']
                     ))
                 path = os.path.join(base, test)
-                self.test = open(path).read()
+                with open(path) as f:
+                    self.test = f.read()
                 self.name = os.path.basename(path)
                 self.path = path
             else: