fixes #13; fixes #18

tests/accept/run/tmacro2.nim

@@ -0,0 +1,27 @@
+discard """
+  output: "ta-da Your value sir: 'HE!!!!o Wor!!d'"
+"""
+
+import macros, strutils
+
+proc testBlock(): string {.compileTime.} = 
+  block myBlock:
+    while true:
+      echo "inner block"
+      break myBlock
+    echo "outer block"
+  result = "ta-da"
+
+macro mac(n: expr): expr =
+  expectKind(n, nnkCall)
+  expectLen(n, 2)
+  expectKind(n[1], nnkStrLit)
+  var s: string = n[1].strVal
+  s = s.replace("l", "!!")
+  result = newStrLitNode("Your value sir: '$#'" % [s])
+
+const s = testBlock() 
+const t = mac("HEllo World")
+echo s, " ", t
+
+