Author: Mark Nelson
MDL-49200 core_form: corrected string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=376d6d9bc09f2a7466d0a9192fd7df244c1621d7
http://github.com/moodle/moodle/commit/376d6d9bc09f2a7466d0a9192fd7df244c1621d7
+ 2.8 en [err_maxlength,core_form]