optional variable deffinition added, annotations removed

tests/test_code.lang

@@ -278,6 +278,9 @@ def scan-three = & \io..scan: & \io..scan: & \io..scan:
 exec main {
   var n = scan-anything:[int]
   var x = (for _ in 0--n do scan-int:) // $array[int] & 0
+
+  var k? = if n < 2 then n in print-anything:[string] "n < 2"
+
   ; print-anything:[int] n
 
   var & a & b & c = scan-three-t:

tests/variables.lang

@@ -6,6 +6,8 @@ def test-variables : a = {
 
   var z = 543.32 in {
     for x in 1--10 do print: 111
-    if scan:[int] < 11 then do-something-another: z "ccc"
+    if scan:[int] < 11 then do-something-another: z "aaa"
   }
+
+  var (& t? & _ & t3)? = maybe-something: in do-something-func: t1 t3
 }