Make the normalizer tests' indentation easier to understand.

test/normalizer_issue_files/E70.py

@@ -17,5 +17,5 @@ async def f(x): return 2
 #: E704:10
 def f(x): return 2 * x
 while all is round:
-    #: E704:10
+    #: E704:14
     def f(x): return 2 * x

test/normalizer_issue_files/E73.py

@@ -1,7 +1,7 @@
 #: E731:4
 f = lambda x: 2 * x
 while False:
-    #: E731:6
+    #: E731:10
     foo = lambda y, z: 2 * x
 # Okay
 f = object()

test/test_normalizer_issues_files.py

@@ -18,7 +18,7 @@ def collect_errors(code):
                 column = len(match.group(1))
                 if ':' in code:
                     code, _, add_indent = code.partition(':')
-                    column += int(add_indent)
+                    column = int(add_indent)
 
                 yield "%s@(%s,%s)" % (code, line_nr + 1, column)