'assert' is now implemented without compiler magic

tests/run/tuserassert.nim

@@ -0,0 +1,14 @@
+discard """
+  output: "454 == 45ugh"
+"""
+
+template myAssert(cond: expr) = 
+  when rand(3) < 2:
+    let c = cond.astToStr
+    {.warning: "code activated: " & c.}
+    if not cond:
+      echo c, "ugh"
+  
+
+myAssert(454 == 45)
+