regex issues with 'q' flag in fn:tokenize

[Sorin Marian Nasoi]

From http://www.w3.org/TR/xpath-functions-30/#regex-syntax:

"q: if present, all characters in the regular expression are treated as representing themselves, not as metacharacters. In effect, every character that would normally have a special meaning in a regular expression is implicitly escaped by preceding it with a backslash.

Furthermore, when this flag is present, the characters $ and \ have no special significance when used in the replacement string supplied to the fn:replace function.

This flag can be used in conjunction with the i flag. If it is used together with the m, s, or x flag, that flag has no effect."

The test-cases "fn-tokenize-31" and "fn-tokenize-33" from "fn-tokenize" test-set are failing: please see attached log.