While trying to understand why PSReadLine highlights operator tokens in command mode as operators (though they are not in that context) , I determined that the parser/tokenizer (Tokens Class) has a method that specifically resets the TokenKind of a token, to 'Generic'. However it fails to remove the flags originally set from the original TokenKind. This most commonly occurs to the operators, which in command mode, are not operators and instead are treated as unquoted arguments. PSReadLine uses the TokenFlags UnaryOperator, BinaryOperator and AssignmentOperator to highlight operators, and so that is what it sees

Steps to reproduce

echo 1 + 2 + 3 (1 + 2 + 3)
#      ^   ^ not operators
#                 ^   ^ operators!