fixed VisibilityFixer to work with new lines and vertical space characters
bug #256 fixed VisibilityFixer to work with new lines and vertical space characters (sstok)

This PR was merged into the master branch.

Discussion
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fixed VisibilityFixer to work with new lines and vertical space characters

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #255
| License       | MIT

fixed VisibilityFixer to work with new lines and vertical space characters

Commits
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47daf86 fixed VisibilityFixer to work with new lines and vertical space characters