IDLE: Fix typos in docs and comments (GH-13749)

Lib/idlelib/idle_test/htest.py

@@ -12,7 +12,7 @@ or function) whose .__name__ attribute is also X (the usual situation).
 The first parameter of X must be 'parent'.  When called, the parent
 argument will be the root window.  X must create a child Toplevel
 window (or subclass thereof).  The Toplevel may be a test widget or
-dialog, in which case the callable is the corresonding class.  Or the
+dialog, in which case the callable is the corresponding class.  Or the
 Toplevel may contain the widget to be tested or set up a context in
 which a test widget is invoked.  In this latter case, the callable is a
 wrapper function that sets up the Toplevel and other objects.  Wrapper

Lib/idlelib/idle_test/mock_tk.py

@@ -37,7 +37,7 @@ class Mbox_func:
     """Generic mock for messagebox functions, which all have the same signature.
 
     Instead of displaying a message box, the mock's call method saves the
-    arguments as instance attributes, which test functions can then examime.
+    arguments as instance attributes, which test functions can then examine.
     The test can set the result returned to ask function
     """
     def __init__(self, result=None):

Lib/idlelib/idle_test/test_pyparse.py

@@ -160,7 +160,7 @@ class PyParseTest(unittest.TestCase):
             TestInfo('\n   def function1(self, a,\n', [0, 1, 2], BRACKET),
             TestInfo('())\n', [0, 1], NONE),                    # Extra closer.
             TestInfo(')(\n', [0, 1], BRACKET),                  # Extra closer.
-            # For the mismatched example, it doesn't look like contination.
+            # For the mismatched example, it doesn't look like continuation.
             TestInfo('{)(]\n', [0, 1], NONE),                   # Mismatched.
             )