style: fmt

Author: SteveLauC

src/pty.rs

@@ -335,7 +335,7 @@ feature! {
 ///
 /// In a multithreaded program, only [async-signal-safe] functions like `pause`
 /// and `_exit` may be called by the child (the parent isn't restricted) until
-/// a call of `execve(2)`. Note that memory allocation may **not** be 
+/// a call of `execve(2)`. Note that memory allocation may **not** be
 /// async-signal-safe and thus must be prevented.
 ///
 /// Those functions are only a small subset of your operating system's API, so