Update src/items/functions.md

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

Author: gnzlbg

src/items/functions.md

@@ -163,7 +163,7 @@ extern "C" fn new_i32() -> i32 { 0 }
 let fptr: extern "C" fn() -> i32 = new_i32;
 ```
 
-Since functions with an ABI that differs from `"Rust"` do not support 
+Functions with an ABI that differs from `"Rust"` do not support 
 unwinding in the exact same way that Rust does, unwinding past the end 
 of functions with such ABIs causes the process to abort. In LLVM, this is
 implemented by executing an illegal instruction.