cucumber / cucumber-cpp / 689

63%

master: 62%

Pull #224

travis-ci

Recalculate position so it is based on the index of unicode codepoints.

`cucumber-ruby` expects position values which are based on the index of
the codepoint instead of the index of the code unit. This change modifies
the value returned to `cucumber-ruby`.

Prior to this change, the RegexSubMatch's position, which was correct in
terms of a code unit array, would cause an `index out of string` error and
crash cucumber-ruby when pretty-printing the results of a test.

This commit also ammends the added tests to demonstrate the corrected
behavior.

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