2014-01-21: more colon tests - and more bugs found.

more colon tests - and more bugs found.

diff --git a/tests/syntax-colon.scm b/tests/syntax-colon.scm
--- a/tests/syntax-colon.scm
+++ b/tests/syntax-colon.scm
@@ -20,5 +20,11 @@
   (format #t "a: ~A, b: ~A"
                a      b))
 
+(let ((a '())))
 
+(let 
+  (
+    (a
+      '())))
 
+
diff --git a/tests/syntax-colon.w b/tests/syntax-colon.w
--- a/tests/syntax-colon.w
+++ b/tests/syntax-colon.w
@@ -20,3 +20,9 @@ let
   format #t "a: ~A, b: ~A"
             .    a      b
 
+let : : a ' :
+
+let 
+  : 
+    a
+      '