fixing TypelessParam warning in x=>x+1, added test

tests/generics/tmap_auto.nim

@@ -0,0 +1,13 @@
+import future
+
+let x = map(@[1, 2, 3], x => x+10)
+assert x == @[11, 12, 13]
+
+let y = map(@[(1,"a"), (2,"b"), (3,"c")], x => $x[0] & x[1])
+assert y == @["1a", "2b", "3c"]
+
+proc eatsTwoArgProc[T,S,U](a: T, b: S, f: proc(t: T, s: S): U): U =
+  f(a,b)
+
+let z = eatsTwoArgProc(1, "a", (t,s) => $t & s)
+assert z == "1a"