Update test; whitespace is allowable, and does not cause an update
This also steps around a bug in WWW::Mechanize -- namely, while real browsers ignore a newline that directly follows a <textarea>, WWW::Mechanize does not. As such, it views <textarea>\n</textarea> as containing a newline, whereas browsers view it as empty. In this case, bulk update ignores it unless it has non-whitespace, causing the difference to be immaterial.
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