core: evaluate left/right part of comparison after split on the comparison operator in ${if:xxx} (closes #1627)

To force evaluation of the expression before doing the comparison (less safe),
the "${eval_cond:xxx}" can be used.

With the old behavior we had:

    >> ${if:a==b}
    == [0]
    >> ${if:${raw:a==b}}
    == [0]
    >> ${if:${eval_cond:${raw:a==b}}}
    == [0]

And with the new behavior, we have:

    >> ${if:a==b}
    == [0]
    >> ${if:${raw:a==b}}
    == [1]
    >> ${if:${eval_cond:${raw:a==b}}}
    == [0]

0 files changed, 0 insertions, 0 deletions