at newline characters. In MRI mode, always keep spaces in the
operands field. In MRI mode, treat a line comment character as a
regular comment character following a space.
* cond.c (ignore_input): Use strncasecmp rather than strncmp when
looking for special pseudo-ops.
* read.c (cons_worker): In MRI mode, the expressions stop at the
first unquoted space.
(equals): Likewise.
