Replace 'return' with 'next' in block

[kansaichris]

Fixes a pretty nasty logic error that prevents HTML::Proofer from checking any links in a file once it finds one that should be ignored.

To Do

• Write test(s) to prevent future regressions

[kansaichris]

To be honest, I think that the other return statements in Links#run are suspect, too.

[gjtorikian]

Oh, shit! That's a big boo-boo. Are you working on a test, or do you want me to write one up real quick? Thanks!

[kansaichris]

Are you working on a test, or do you want me to write one up real quick?

I haven't started working on a test yet—to be honest, your knowledge of the code base would probably make you more qualified to do it than me. 😄