I'm trying to use an insensitive collator ( primary strength ) to search pattern inside a text.
My text contain a mixed kana: hiragana and katakana symbols
I excpected `r==1` but it's `r==6`. which means that `あ !=ア` using m_collator.
But when using same collator for text comparaison it works and I get `あ ==ア`.
I experienced same issue within half-width and full-width character