fixed 'pref' type having + on every added line

pref.go

@@ -33,7 +33,7 @@ func applyPrefModifications(targetFilePath string, modifications []string) error
 			end := strings.LastIndex(mod, ")")
 			if start > 0 && end > start {
 				key := strings.TrimSpace(mod[start+1 : end]) // Extract the preference key
-				modMap[key] = mod                            // Full modification line
+				modMap[key] = strings.TrimPrefix(mod, "+")   // Full modification line
 			}
 		}
 	}