tree 43db9e01cc5b7907ba8bda9d25fa44e4dc510ef1
parent a184153a2c240be9e8aaaf00a34f03502e63977a
author Frank Tang <ftang@chromium.org> 1545860897 -0800
committer Frank Yung-Fong Tang <41213225+FrankYFTang@users.noreply.github.com> 1549567958 -0800

ICU-20321 Fix ultag_isUnicodeLocaleKey

Returns false when passingin alphanum digit.
Sync with UTS35
https://www.unicode.org/reports/tr35/#Unicode_locale_identifier

address review feedback add unit tests.

Fix Java too

add test cases to c++

Fix format

change test case