Assorted code cleanups for readability.  Greatly boosted the size of the
test data:  this test fails on WIndows now if universal newlines are
enabled (which they aren't yet, by default).  I don't know whether the
test will also fail on Linux now.
diff --git a/Lib/test/test_univnewlines.py b/Lib/test/test_univnewlines.py
index 8d6a874..8de9735 100644
--- a/Lib/test/test_univnewlines.py
+++ b/Lib/test/test_univnewlines.py
@@ -4,26 +4,32 @@
 import os
 import sys
 
-DATA_TEMPLATE=[
-    "line1=1",
-        "line2='this is a very long line designed to go past the magic " +
-    "hundred character limit that is inside fileobject.c and which " +
-    "is meant to speed up the common case, but we also want to test " +
-    "the uncommon case, naturally.'",
-    "def line3():pass"
-    ]
-DATA_LF = "\n".join(DATA_TEMPLATE) + "\n"
-DATA_CR = "\r".join(DATA_TEMPLATE) + "\r"
-DATA_CRLF = "\r\n".join(DATA_TEMPLATE) + "\r\n"
-# Note that DATA_MIXED also tests the ability to recognize a lone \r
-# before end-of-file.
-DATA_MIXED = "\n".join(DATA_TEMPLATE) + "\r"
-DATA_SPLIT = map(lambda x: x+"\n", DATA_TEMPLATE)
-
 if not hasattr(sys.stdin, 'newlines'):
     raise test_support.TestSkipped, \
         "This Python does not have universal newline support"
 
+FATX = 'x' * (2**14)
+
+DATA_TEMPLATE = [
+    "line1=1",
+    "line2='this is a very long line designed to go past the magic " +
+        "hundred character limit that is inside fileobject.c and which " +
+        "is meant to speed up the common case, but we also want to test " +
+        "the uncommon case, naturally.'",
+    "def line3():pass",
+    "line4 = '%s'" % FATX,
+    ]
+
+DATA_LF = "\n".join(DATA_TEMPLATE) + "\n"
+DATA_CR = "\r".join(DATA_TEMPLATE) + "\r"
+DATA_CRLF = "\r\n".join(DATA_TEMPLATE) + "\r\n"
+
+# Note that DATA_MIXED also tests the ability to recognize a lone \r
+# before end-of-file.
+DATA_MIXED = "\n".join(DATA_TEMPLATE) + "\r"
+DATA_SPLIT = [x + "\n" for x in DATA_TEMPLATE]
+del x
+
 class TestGenericUnivNewlines(unittest.TestCase):
     # use a class variable DATA to define the data to write to the file
     # and a class variable NEWLINE to set the expected newlines value
@@ -74,33 +80,34 @@
         self.assertEqual(data, DATA_SPLIT[1:])
 
     def test_execfile(self):
-        dict = {}
-        execfile(test_support.TESTFN, dict)
-        func = dict['line3']
+        namespace = {}
+        execfile(test_support.TESTFN, namespace)
+        func = namespace['line3']
         self.assertEqual(func.func_code.co_firstlineno, 3)
+        self.assertEqual(namespace['line4'], FATX)
 
 
 class TestNativeNewlines(TestGenericUnivNewlines):
-    NEWLINE=None
-    DATA=DATA_LF
-    READMODE='r'
-    WRITEMODE='w'
+    NEWLINE = None
+    DATA = DATA_LF
+    READMODE = 'r'
+    WRITEMODE = 'w'
 
 class TestCRNewlines(TestGenericUnivNewlines):
-    NEWLINE='\r'
-    DATA=DATA_CR
+    NEWLINE = '\r'
+    DATA = DATA_CR
 
 class TestLFNewlines(TestGenericUnivNewlines):
-    NEWLINE='\n'
-    DATA=DATA_LF
+    NEWLINE = '\n'
+    DATA = DATA_LF
 
 class TestCRLFNewlines(TestGenericUnivNewlines):
-    NEWLINE='\r\n'
-    DATA=DATA_CRLF
+    NEWLINE = '\r\n'
+    DATA = DATA_CRLF
 
 class TestMixedNewlines(TestGenericUnivNewlines):
-    NEWLINE=('\r', '\n')
-    DATA=DATA_MIXED
+    NEWLINE = ('\r', '\n')
+    DATA = DATA_MIXED
 
 
 def test_main():