Upstream gookit/goutil state of the touched files before 71dcf88743

strutil/split.go

@@ -166,12 +166,6 @@ func Substr(s string, pos, length int) string {
 		stopIdx = strLn + length
 	}
 
-	// A negative length can move stopIdx before pos; clamp to avoid an
-	// out-of-range slice.
-	if stopIdx < pos {
-		stopIdx = pos
-	}
-
 	return string(runes[pos:stopIdx])
 }