comm: almost total rewrite; add testsuite

function                                             old     new   delta
writeline                                            128     125      -3
comm_main                                            540     239    -301
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-304)           Total: -304 bytes

1 files changed, 1 insertions, 2 deletions

diff --git a/testsuite/awk.tests b/testsuite/awk.tests
index f69da2cc9..4eabd7595 100755
--- a/testsuite/awk.tests
+++ b/testsuite/awk.tests
@@ -1,12 +1,11 @@
 #!/bin/sh
 
-# awk tests.
 # Copyright 2007 by Denys Vlasenko <vda.linux@googlemail.com>
 # Licensed under GPL v2, see file LICENSE for details.
 
 . testing.sh
 
-# testing "description" "arguments" "result" "infile" "stdin"
+# testing "description" "command" "result" "infile" "stdin"
 
 testing "awk -F case 0" "awk -F '[#]' '{ print NF }'" ""    "" ""
 testing "awk -F case 1" "awk -F '[#]' '{ print NF }'" "0\n" "" "\n"