Update src/items/functions.md

Co-Authored-By: Mazdak Farrokhzad <twingoow@gmail.com>

Author: gnzlbg

src/items/functions.md

@@ -156,7 +156,7 @@ extern fn new_i32() -> i32 { 0 }
 let fptr: extern fn() -> i32 = new_i32;
 ```
 
-is identical to
+is equivalent to:
 
 ```rust
 extern "C" fn new_i32() -> i32 { 0 }