The %KLEFT and %KQLEFT
macro functions left-align arguments by removing leading blanks. If
the argument contains a special character or mnemonic operator, listed
here, use %KQLEFT.
%KLEFT returns an unquoted
result, even if the argument is quoted. %KQLEFT produces a result
with the following special characters and mnemonic operators masked
so that the macro processor interprets them as text instead of as
elements of the macro language:
& % ' " ( ) + - * / < > = ¬ ^ ~ ; , # blank
AND OR NOT EQ NE LE LT GE GT IN