style: renamed i variable for consistency

Signed-off-by: Jesse Simpson <jesse.simpson36@gmail.com>

pkg/engine/engine.go

@@ -431,11 +431,11 @@ func cleanupExecError(filename string, err error) error {
 	}
 
 	finalErrorString := ""
-	for _, i := range fileLocations {
-		if i.message == "" {
+	for _, fileLocation := range fileLocations {
+		if fileLocation.message == "" {
 			continue
 		}
-		finalErrorString = finalErrorString + i.String()
+		finalErrorString = finalErrorString + fileLocation.String()
 	}
 
 	return fmt.Errorf("NEW ERROR FORMAT: \n%s\n\n\nORIGINAL ERROR:\n%s", finalErrorString, err.Error())