Revert "Temporarily trim leading/trailing whitespace from parser test clauses"

Revert "Temporarily trim leading/trailing whitespace from parser test clauses"

This reverts commit 0363dbf98e6b71e92d439e0e2020bb388cc2aea2, since
T208070 is now merged.

Bug: T208070
Depends-On: I05511aee275238954f22db78616b19ce10cd6490
Depends-On: I120ca25a77b7b933de4afddd1d458e36a95e26da
Depends-On: I47d1d9620031036b9497cacf70b34a45c3e5f409
Depends-On: I6119b4af9632496dbda81c3a3951c55217e7c2d5
Depends-On: I584f74e2ba0d14c2975fb43cc53c5e26080e6fc7
Depends-On: Ie70e1915c172d2d67b3b8b90eb35f753b800f61e
Depends-On: I74953d5de765a2245a2999f17c7ae1cf49376bd1
Change-Id: I63f60b2e8beea9dde883c4ad65d0bd4411f93e70