lazy-str-get-trailing-list: spurious empty string issue.

* lib.c (lazy_str_get_trailing_list): Remove the spurious
empty string caused by splitting on the terminator.
Whenever the materialized prefix is not-empty, and there is
a non-empty terminator, the prefix necessarily ends in the
termintator. If we split on the terminator, the list of pieces
ends in in an empty string, which is undesirable.
This has to be subject to compat, unfortunately; it's a
very visible behavior that affects the continuation of
line-based matching after the @(freeform) directive.

* tests/006/freeform-5.txr: With this fix, we no longer have
to match the spurious blank line coming from @(freeform).

* tests/015/lazy-str.tl: New file.

* txr.1: Updated documentation with compat notes. There was
some outright incorrect text describing
lazy-str-get-trailing-list. Also, the lazy-str-force-upto
and lazy-str-force were under-documented.  The return value of
the former was not completely described: that it returns t
in the other case when not returning nil. It wasn't mentioned
that the functions observe the limit-count. Moreover, the
exact algorithm for forcing is now documented.

0 files changed, 0 insertions, 0 deletions