1.1.0 ignores trailing white spaces on lines without text

[jby]

This file is tested without error (space made visible by brackets):

# Class foo
class foo {
[ ]
}

If the file looks like this, the error is reported (space made visible by brackets):

# Class foo
class foo {
  include foo[ ]
}

[ghoneycutt]

+1 was able to confirm

[ghoneycutt]

@rodjek

Created PR #360 but need help with the code to fix the issue.