"Replace 'decimal' parameter with 'standard' in 'util::content_size_pretty', wich now supports three different standards (SI base-10, IEC base-2 and the old JEDEC base-2), change default to SI base-10 and modify automated tests accordingly". +info: https://en.wikipedia.org/wiki/Binary_prefix
don't use non-existing method name in test specification.This fixes a bug on openacs.org in source search of API browser.TODO: the procs specified in the test definition (aa_register_case)should be checked for existence.