Show a real offset with AAA03 and AAA04 errors

[jamescooke]

Errors regarding missing blank lines point at the 0th offset of the line above. This looks strange because those lines are always indented.

$ python -m flake8_aaa examples/bad/test_aaa03.py 
------+------------------------------------------------------------------------
 1 DEF|def test():
 2 ARR|    x = 1
       ^ AAA03 expected 1 blank line before Act block, found none
 3 ACT|    result = x**2
 4 BL |
 5 ASS|    assert result == 4
------+------------------------------------------------------------------------
    1 | ERROR

Instead of pointing at the start of line 2, this example should point at the x:

 2 ARR|    x = 1
           ^ AAA03 expected 1 blank line before Act block, found none

[jamescooke]

AAA03 errors should be moved down a line to the ACT block. This is where they used to point:

     ------+------------------------------------------------------------------------
      1 DEF|def test():
      2 ARR|    x = 1
      3 ARR|    y = 1
+           ^ AAA03 expected 1 blank line before Act block, found none
      4 ACT|    result = x + y
-               ^ AAA03 expected 1 blank line before Act block, found none
      5 BL |
      6 ASS|    assert result == 2
     ------+------------------------------------------------------------------------
         1 | ERROR

This makes the command line output easier to read and takes the editor to the first line of the ACT block when jumping to the line of the error.

[jamescooke]

Also add examples where # noqa is added to the appropriate lines to prevent the linting check - the location of the # noqa should make sense in the context of the test.