2014-11-27: fix scheme version of the syntax-strings-parens test.

fix scheme version of the syntax-strings-parens test.

diff --git a/tests/syntax-strings-parens.scm b/tests/syntax-strings-parens.scm
--- a/tests/syntax-strings-parens.scm
+++ b/tests/syntax-strings-parens.scm
@@ -19,5 +19,5 @@ bar] barz {1 + [* 2 2]})
 (mara {
 li
 +
-lo (mabba)
+lo - (mabba)
 })