[ruby/io-console] Avoid the influence of special variable $/

https://github.com/ruby/io-console/commit/5f71354332

ext/io/console/console.c

@@ -1564,7 +1564,7 @@ static VALUE
 str_chomp(VALUE str)
 {
     if (!NIL_P(str)) {
-	rb_funcallv(str, id_chomp_bang, 0, 0);
+	rb_funcallv(str, id_chomp_bang, 1, &rb_default_rs);
     }
     return str;
 }

test/io/console/test_io_console.rb

@@ -258,6 +258,15 @@ defined?(PTY) and defined?(IO.console) and TestIO_Console.class_eval do
       assert_equal("\r\n", r.gets)
       assert_equal("\"asdf\"", r.gets.chomp)
     end
+
+    run_pty("$VERBOSE, $/ = nil, '.'; p IO.console.getpass('> ')") do |r, w|
+      assert_equal("> ", r.readpartial(10))
+      sleep 0.1
+      w.print "asdf\n"
+      sleep 0.1
+      assert_equal("\r\n", r.gets)
+      assert_equal("\"asdf\"", r.gets.chomp)
+    end
   end
 
   def test_iflush