Sync parserTests with core.

This matches upstream commit 2305dbbd2aa5723e53d116e04d97730fe0811629.

The following bugs are related to the blacklist changes:
* Bug 6200, bug 52761: newlines and preformatted in blockquote
* Bug 52938: Tabs do not cause indent-pres, only spaces do
* Bug 49926: posessives and italics
* Bug 52762: lines with WS and comments only should be transparent to all

Change-Id: I5a8281a67e1978459a1f14dd4503ea1e497a8fe8