// no keyword match is found. If no keyword match is found, __ke is returned.
// Else an iterator pointing to the matching keyword is found. If more than
// one keyword matches, an iterator to the first matching keyword is returned.
-// If on exit __b == __e, eofbit is set in __err. If __case_senstive is false,
+// If on exit __b == __e, eofbit is set in __err. If __case_sensitive is false,
// __ct is used to force to lower case before comparing characters.
// Examples:
// Keywords: "a", "abb"