Add failing test case for newlines

[tremby]

There are two modes of failure here. The first added test string shows that indentation is not properly added after a newline. The second part, which is a new type of test, shows that the line following the
newline does not extend to the full length limit before it is broken again by this module. (It also shows the first issue, but not part of the existing test framework, so I thought maybe both are valuable.) To
illustrate:

Expected (there's a newline just before the capital B):

A a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
    a a a a a a a a a a a
    B b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b
    b b b b b b b b b b b

Actual:

A a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
    a a a a a a a a a a a
B b b b b b b b b b b b b b b b b b b b b b b b b b b
    b b b b b b b b b b b b b b b b b b b b b b b b

[coveralls]

Coverage remained the same at 100.0% when pulling 7a62156 on tremby:newlines-test-case into 61043fb on codekirei:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 7a62156 on tremby:newlines-test-case into 61043fb on codekirei:master.