Bug 62323: Eat > and [ in table / tr attribute names too

These chars are normally not matched by the attribute_preprocessor_text_line
production, but eating them in table / tr attributes is fine as anything
that's not a valid attribute on the same line is stripped by the PHP parser
too.

Change-Id: Ia2df78821913c7599df6f18bc5ecd3ca381ccc80
Merge "Bug 62323: Eat > and [ in table / tr attribute names too"