desguar += and -=

examples/puzzles/euler_12.zr

@@ -4,18 +4,18 @@ func num_divisors[n: i64] : i64
     out := 0
     for i in 1..end+1
         if n % i == 0
-            out = out + 2
+            out += 2
 
     if end * end == n
-        out = out - 1
+        out -= 1
     return out
 
 func main[] : i64
     n := 0
     i := 1
     while true
-        n = n + i
+        n += i
         if num_divisors(n) > 500
             io.println_i64(n)
             break
-        i = i + 1
+        i += 1