matching error fails with >>> string

[cbm755]

This doctest does not pass:

% >> 2 + (1 + !))
% ??? parse error:
%
% syntax error
%
% >>> 2 + (1 + !))
%               ^
%
%
% >> a = 43
% a = 43

This does:

% >> 2 + (1 + !))
% ??? parse error:
%
% syntax error >>> 2 + (1 + !)) ^
%
%
% >> a = 43
% a = 43

@catch22 pointed out

From a quick glance the regex part capturing the output does
stop upon meeting >> (rather than >> ).