The function `wp_text_diff` generated an invalid table structure if the $args parameter contained any values. This patch corrects the structure generated by `wp_text_diff` and related usages so that the column count matches the data generated. Additionally, this patch passes arguments to the Revisions screen so that the screen has column headings that reflect the content in each column. Improves the accessibility and usability of the Revisions table.
Props joedolson, mehulkaklotar, afercia, adamsilverstein, zodiac1978, jeremyfelt
Fixes#25473
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git-svn-id: http://core.svn.wordpress.org/trunk@49735 1a063a9b-81f0-0310-95a4-ce76da25c4cd