Author: Helen Foster
MDL-45599 Fix tiny grammatical errors in the plugin installer
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e7cd68076554a8290b2ddcbd2758b8b7665ef386
http://github.com/moodle/moodle/commit/e7cd68076554a8290b2ddcbd2758b8b7665ef386
+ 2.7 en [remoterequestpermcheck,tool_installaddon]
+ 2.7 en [validationmsg_targetexists_help,tool_installaddon]