Fix for bug 889739: pt-config-diff doesn't diff quoted strings properly

t/lib/MySQLConfigComparer.t

@@ -9,7 +9,7 @@ BEGIN {
 use strict;
 use warnings FATAL => 'all';
 use English qw(-no_match_vars);
-use Test::More tests => 16;
+use Test::More;
 
 use TextResultSetParser();
 use MySQLConfigComparer;
@@ -369,6 +369,29 @@ $c2 = new MySQLConfig(
    ) or print Dumper($diff);
 }
 
+# ############################################################################
+# https://bugs.launchpad.net/percona-toolkit/+bug/889739
+# pt-config-diff doesn't diff quoted strings properly
+# ############################################################################
+$c1 = new MySQLConfig(
+   file                => "$trunk/$sample/quoted_cnf.txt",
+   TextResultSetParser => $trp,
+);
+$c2 = new MySQLConfig(
+   file                => "$trunk/$sample/unquoted_cnf.txt",
+   TextResultSetParser => $trp,
+);
+{
+    my $diff = $cc->diff(
+      configs => [$c1, $c2],
+    );
+
+    is_deeply(
+        $diff,
+        undef,
+        "Values are the same regardless of quoting"
+    ) or diag(Dumper($diff));
+}
 # #############################################################################
 # Done.
 # #############################################################################
@@ -382,4 +405,5 @@ like(
    qr/Complete test coverage/,
    '_d() works'
 );
-exit;
+
+done_testing;