Runners are used internally.

This reverts commit 40c8aa70.

simplify Class#descendants using singleton_class method

correctly handle order calls after a reorder

Infer currency negative format from positive one.

Remove rescue block to require psych gem

using the active support logger

No need of html_safe here

When a locale file sets the format of the positive
currency value as '%n %u', the default negative
currency format should be '-%n %u'.

tag helper always return a html safe string and concat two html safe
strings always return a html safe string

create_fixtures should accept symbol keys for custom table -> class mappings. Fixes an unintended regression.

Fix GH #4285. Remove options when we record calling creat_table