Fix up two parser tests which don't pass in the PHP parser.

The parser tests "1d. Indent-Pre and Comments" and "6. Pre-blocks
should extend across lines with leading WS" were both failing in the
PHP parser.  Tweak them to match the PHP parser output.  This has the
benefit of getting parsoid to pass one of them!

Change-Id: Id6b7daa2b1b8a7d507305cbbf5d00c71ce7ac54a
Merge "Fix up two parser tests which don't pass in the PHP parser."