update repo layout

en/src/fight-compiler/borrowing.md

@@ -0,0 +1,29 @@
+# Borrowing
+
+1. 🌟🌟
+```rust,editable
+// FIX the error without removing any code line
+struct test {
+    list: Vec<i32>,
+    a: i32
+}
+
+impl test {
+    pub fn new() -> Self {
+        test { list:vec![1,2,3,4,5,6,7], a:0 }
+    }
+
+    pub fn run(&mut self) {
+        for i in self.list.iter() {
+            self.do_something(*i)
+        }
+
+    }
+
+    pub fn do_something(&mut self, n: i32) {
+        self.a = n;
+    }
+}
+
+fn main() {}
+```