Remove trailing spaces (#665)

* Remove trailing spaces

* PR-665 -  Remove trailing spaces

- Updated not stable test t/pt-online-schema-change/preserve_triggers.t
- Updated utilities in bin directory

* PR-665 -  Remove trailing spaces

- Fixed typos

* PR-665 -  Remove trailing spaces

- Fixed typos

---------

Co-authored-by: Sveta Smirnova <sveta.smirnova@percona.com>

docs/rn.3-0-9.txt

@@ -6,7 +6,7 @@ New Tools
 
 * :jirabug:`PT-1501`: ``pt-secure-collect`` - New tool to collect and sanitize pt-tools outputs
 
-New Features 
+New Features
 
 * :jirabug:`PT-1530`: Add support for encryption status to ``pt-mysql-summary``
 * :jirabug:`PT-1526`: Add ndb status to ``pt-mysql-summary`` (Thanks Fernando Ipar)
@@ -15,7 +15,7 @@ New Features
 * :jirabug:`PT-1508`: Add ``--read-only-interval`` and ``--fail-successive-errors`` flags to ``pt-heartbeat`` (Thanks Shlomi Noach)
 * :jirabug:`PT-243`: Add ``--max-hostname-length`` and ``--max-line-length`` flags to ``pt-query-digest``
 
-Bug Fixes     
+Bug Fixes
 
 * :jirabug:`PT-1527`: Fixed ``pt-table-checksum`` ignores ``--nocheck-binlog-format``