Author: Luca Bösch
MDL-87338 core_table: avoid string concatenation.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=348498c0b7c1d11904545a75dd4440b0e1f80bad
http://github.com/moodle/moodle/commit/348498c0b7c1d11904545a75dd4440b0e1f80bad
+ 5.0 en [hidex,core]
+ 5.0 en [showx,core]