Commit failing UTF-8 test case for Line Wrap

[johnnyshields]

I am experiencing character conversion issues in the LineWrap module. Using Ruby 1.9.3 on Windows. I've provided an example test case which gives:

Encoding::CompatibilityError: incompatible encoding regexp match (ASCII-8BIT regexp with UTF-8 string)

[johnnyshields]

In some cases I get the opposite error (UTF-8 regexp with ASCII-8BIT string)

[practicingruby]

This seems like it may be a related issue to #603, captured at a lower level. I'll make a minor tweak and merge.

[practicingruby]

@johnnyshields I added a couple tags to prevent our CI from breaking, but otherwise kept your test as-is.

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Thanks!

[johnnyshields]

@sandal, thank you. Looks like #603 is the main problem I'm having.