#8011: use exc.tb_lineno instead of traceback.tb_lineno() and pep8ify variable names.

Doc/library/traceback.rst

@@ -175,12 +175,12 @@ exception and traceback::
 
    try:
        lumberjack()
-   except:
-       exceptionType, exceptionValue, exceptionTraceback = sys.exc_info()
+   except IndexError:
+       exc_type, exc_value, exc_traceback = sys.exc_info()
        print "*** print_tb:"
-       traceback.print_tb(exceptionTraceback, limit=1, file=sys.stdout)
+       traceback.print_tb(exc_traceback, limit=1, file=sys.stdout)
        print "*** print_exception:"
-       traceback.print_exception(exceptionType, exceptionValue, exceptionTraceback,
+       traceback.print_exception(exc_type, exc_value, exc_traceback,
                                  limit=2, file=sys.stdout)
        print "*** print_exc:"
        traceback.print_exc()
@@ -189,13 +189,13 @@ exception and traceback::
        print formatted_lines[0]
        print formatted_lines[-1]
        print "*** format_exception:"
-       print repr(traceback.format_exception(exceptionType, exceptionValue,
-                                             exceptionTraceback))
+       print repr(traceback.format_exception(exc_type, exc_value,
+                                             exc_traceback))
        print "*** extract_tb:"
-       print repr(traceback.extract_tb(exceptionTraceback))
+       print repr(traceback.extract_tb(exc_traceback))
        print "*** format_tb:"
-       print repr(traceback.format_tb(exceptionTraceback))
-       print "*** tb_lineno:", traceback.tb_lineno(exceptionTraceback)
+       print repr(traceback.format_tb(exc_traceback))
+       print "*** tb_lineno:", exc_traceback.tb_lineno
 
 
 The output for the example would look similar to this::