tests: add a test for a previously fixed output format bug in join

Add a test and NEWS entry for a bug inadvertently fixed in
a refactoring in commit v8.9-32-gd4db0cb

* tests/misc/join (v2-format): Add a new test.
* THANKS.in: Add the reporter.
* NEWS: Mention the old bug.
* cfg.mk (old_NEWS_hash): Update.

Reported-by: Jean-Pierre Tosoni

NEWS

@@ -477,6 +477,10 @@ GNU coreutils NEWS                                    -*- outline -*-
   join --header now skips the ordering check for the first line
   even if the other file is empty.  [bug introduced in coreutils-8.5]
 
+  join -v2 now ensures the default output format prints the match field
+  at the start of the line when it is different to the match field for
+  the first file. [bug present in "the beginning".]
+
   rm -f no longer fails for EINVAL or EILSEQ on file systems that
   reject file names invalid for that file system.
 

THANKS.in

@@ -275,6 +275,7 @@ Jari Aalto                          jari.aalto@cante.net
 Jarkko Hietaniemi                   jhi@epsilon.hut.fi
 Jarod Wilson                        jwilson@redhat.com
 Jean Charles Delepine               delepine@u-picardie.fr
+Jean-Pierre Tosoni                  jpt.7196@gmail.com
 Jeff Moore                          jbm@mordor.com
 Jeff Sheinberg                      jeff@bsrd.net
 Jens Elkner                         elkner@imsgroup.de

cfg.mk

@@ -45,7 +45,7 @@ export VERBOSE = yes
 # 4914152 9e
 export XZ_OPT = -8e
 
-old_NEWS_hash = 4f70c9ef883feff18d9d5f66a941f3a8
+old_NEWS_hash = 38cad4d11c6ce866fc52213e3a4dc437
 
 # Add an exemption for sc_makefile_at_at_check.
 _makefile_at_at_check_exceptions = ' && !/^cu_install_program =/'

tests/misc/join

@@ -147,6 +147,10 @@ my @tv = (
  ["a,1,,2\nb,1,2\n", "a,3,4\nb,3,4\n"],
  "a,1,,2,3,4\nb,1,2,,3,4\n"],
 
+# For -v2, print the match field correctly with the default output format,
+# when that match field is different between file 1 and file 2.  Fixed in 8.10
+['v2-order', '-v2 -2 2', ["", "2 1\n"], "1 2\n", 0],
+
 # From Tim Smithers: fixed in 1.22l
 ['trailing-sp', '-t: -1 1 -2 1', ["a:x \n", "a:y \n"], "a:x :y \n", 0],