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>

config/sphinx-build/_static/_templates/theme/relbar2.html

@@ -1,6 +1,6 @@
 <div class="md-relbar2__inner md-grid">
 <div class="md-content">
-  <article class="md-content__inner md-typeset" role="main">    
+  <article class="md-content__inner md-typeset" role="main">
     <h4>Contact Us </h4>
        <p>For free technical help, visit the Percona <a class="reference external" href="https://forums.percona.com/c/mongodb/percona-server-for-mongodb/17?utm_campaign=Doc%20pages" target="_blank">Community Forum</a>.<br>
         <p>To report bugs or submit feature requests, open a <a class="reference external" href="https://jira.percona.com/projects/PT/issues/" target="_blank">JIRA</a> ticket.<br>
@@ -8,7 +8,7 @@
          <img referrerpolicy="no-referrer-when-downgrade" src="https://static.scarf.sh/a.png?x-pxid=332312ec-2ca5-4b0f-8ceb-1e30b5eac769" />
          <hr>
          {# Add the last updated timestamp from git commits using gitstamp extension #}
-         {%- if gitstamp %} <small> Last update: {{gitstamp}} </small> 
+         {%- if gitstamp %} <small> Last update: {{gitstamp}} </small>
          {%- endif %}
  </article>
 </div>