Get the indentation errors of files mostly right even in comments.

test/normalizer_issue_files/E11.py

@@ -0,0 +1,52 @@
+if x > 2:
+    #: E111:2
+  print x
+if True:
+    #: E111:5
+     print
+    #: E116:6
+      # 
+    #: E116:2
+  # what
+    # Comment is fine
+# Comment is also fine
+
+if False:
+print
+print
+    print
+mimetype = 'application/x-directory'
+#: E116:5
+     # 'httpd/unix-directory'
+create_date = False
+
+def start(self):
+    if True: # Hello
+        self.master.start() # Comment
+        # try:
+        #: E116:12
+            # self.master.start()
+        # except MasterExit:
+        #: E116:12
+            # self.shutdown()
+        # finally:
+        #: E116:12
+            # sys.exit()
+    # Dedent to the first level
+    #: E116:6
+      # error
+# Dedent to the base level
+#: E116:2
+  # Also wrongly indented.
+# Indent is correct.
+def start(self):  # Correct comment
+    if True:
+        #: E115:0
+#       try:
+        #: E115:0
+#           self.master.start()
+        #: E115:0
+#       except MasterExit:
+        #: E115:0
+#           self.shutdown()
+        self.master.start() # comment

test/normalizer_issue_files/E72.py

@@ -1,7 +1,7 @@
-   #: E721
+#: E721:3
 if type(res) == type(42):
     pass
-   #: E721
+#: E721:3
 if type(res) != type(""):
     pass