Retours sur la structure du code

Sources/ToolCore/StringExtensions.swift

@@ -63,7 +63,7 @@ public extension String {
         replacingOccurrences(of: "~", with: "\(FileManager.default.homeDirectoryForCurrentUser.relativePath)")
     }
     
-    func colorComponent()  -> (alpha: String, red: String, green: String, blue: String) {
+    func colorComponent() -> (alpha: String, red: String, green: String, blue: String) {
         var alpha: String = "FF"
         var red: String
         var green: String
@@ -89,4 +89,19 @@ public extension String {
     func uppercasedFirst() -> String {
         prefix(1).uppercased() + dropFirst()
     }
+
+    func replacingFirstOccurrence(of: String, with: String) -> Self {
+        if let range = self.range(of: of) {
+            let tmp = self.replacingOccurrences(
+                of: of,
+                with: with,
+                options: .literal,
+                range: range
+            )
+
+            return tmp
+        }
+
+        return self
+    }
 }