Author: David Mudrák
MDL-69050 lang: Fix placeholder in the err_wrongfileextension string
The name of the placeholder has been found exclusive and potentially
derogatory. Also the name of variable that was used to populate the
placeholder value. That was not the intention.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d9dc9ae891b8a3877991799c85cda7ac04305683
http://github.com/moodle/moodle/commit/d9dc9ae891b8a3877991799c85cda7ac04305683
+ 4.0 en [err_wrongfileextension,core_form]