Helen Foster authored May 03, 2017 and David Mudrák committed May 03, 2017

Significant string changes:

* errorinvalidbyhour,core_calendar - correcting number from 59 to 23
* cron_help,core_admin - updated recommendation to run cron every minute
* tour1_content_end, tour1_content_welcome, tour2_content_end,
  tour2_content_welcome all in tool_usertours - removing reference to
  3.2
* invalidsesskey,core_error and invalidsesskey,mod_wiki - more
  understandable error message
* pluginname_help and pluginnamesummary in qtype_essay - explaining that
  the question type can be used for file uploads
* formatnoinline, mustattach and mustrequire in qtype_essay - changing
  the word 'inline' to 'online'