Fix duplication of lines in docs

docs/src/tutorials/npm-browser-packages/template-deep-dive/src-lib-rs.md

@@ -83,9 +83,8 @@ Either way, the contents of `utils.rs` define a single public function `set_pani
 
 ```rust
     // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
-    // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global	// allocator.
+    // allocator.
-    // allocator.	#[cfg(feature = "wee_alloc")]
+    if #[cfg(feature = "wee_alloc")] {
-    if #[cfg(feature = "wee_alloc")] {	#[global_allocator]
         #[global_allocator]	static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
 ```