Author: Tim Hunt
MDL-32039 qeupgradehelper: fix typos in the lang strings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9e4598293b9e8d2d686bfc0c485da01cd6145c70
http://github.com/moodle/moodle/commit/9e4598293b9e8d2d686bfc0c485da01cd6145c70
+ 2.3 en [invalidquizid,tool_qeupgradehelper]
+ 2.3 en [listupgraded,tool_qeupgradehelper]
+ 2.3 en [listupgradedintro,tool_qeupgradehelper]
+ 2.3 en [veryoldattemtps,tool_qeupgradehelper]