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>

sandbox/servers/5.7/sys/functions/sys_get_config.sql

@@ -87,7 +87,7 @@ BEGIN
 
     -- Check if we have the variable in the sys.sys_config table
     SET v_value = (SELECT value FROM sys.sys_config WHERE variable = in_variable_name);
-  
+
     -- Protection against the variable not existing in sys_config
     IF (v_value IS NULL) THEN
         SET v_value = in_default_value;