tr: do not reject an unmatched [:lower:] or [:upper:] in SET1.

* NEWS: Mention this.
* src/tr.c (get_next) [RE_CHAR_CLASS]: Don't skip the loop when
processing [:lower:] and [:upper:].
(main): Require [:lower:] or [:upper:] in SET1 only when
when one of those is specified in SET2.
* tests/tr/Test.pm: Add tests for this fix.
Reported by Per Starbäck.

Signed-off-by: Jim Meyering <meyering@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/THANKS b/THANKS
index cdddec497..0b0124b90 100644
--- a/THANKS
+++ b/THANKS
@@ -407,6 +407,7 @@ Paul Worrall                        paul@basilisk.uklinux.net
 Pawel Prokop                        pablo@wizard.ae.krakow.pl
 Per Cederqvist                      ceder@lysator.liu.se
 Per Kristian Hove                   perhov@math.ntnu.no
+Per Starbäck                        starback@stp.lingfil.uu.se
 Peter Breitenlohner                 peb@mppmu.mpg.de
 Peter Dyballa                       peter_dyballa@web.de
 Peter Eriksson                      peter@ifm.liu.se