fix typo in debug log

(cherry picked from commit e417d54f543ac416a596f0d8d615c4c644268f72)
fix typo

UTS (Unicode Technical Standard) #18: Unicode Regular Expressions
http://unicode.org/reports/tr18/
(cherry picked from commit 23bebce8d343e5f101011c970698b285b32f6739)
fix typo

(cherry picked from commit 8bdfe8c12491e04e45ad48a7527a72a7ff2942aa)
fix typos

(cherry picked from commit 2ef3b939f20134bf40b572913096b7014548138e)
fix typo

see: e3b36f47f5c3eee40a426eef6b21c406b9a6651d