% 1
> \cals@ifInRspan=macro:
#1->\iffalse .
> the letter L.
% 2
> \cals@ifInRspan=macro:
#1->\iftrue .
> the letter X.
% 3
> \cals@ifInRspan=macro:
#1->\iftrue .
> the letter X.
% 4
> \cals@ifInRspan=macro:
#1->\iftrue .
> the letter L.
% 5
> \cals@ifInRspan=macro:
#1->\iffalse .
> the letter L.
