Stripped lots of boilerplate prepare for minimal test branch

src/utils.go

@@ -1,4 +1,4 @@
-package src
+package main
 
 import (
 	"crypto/rand"
@@ -104,7 +104,7 @@ func atoiSafe(s string) int {
 }
 
 // minimal sscanf to avoid fmt import just for one call
-func fmtSscanf(s, format string, a *int) (int, error) {
+func fmtSscanf(s, _ string, a *int) (int, error) {
 	// Only supports "%d"
 	n := 0
 	for i := 0; i < len(s); i++ {