Replace Ie with In other words

Co-authored-by: Joshua Nelson <joshua@yottadb.com>

library/std/src/sys/unix/ext/process.rs

@@ -172,7 +172,7 @@ pub trait ExitStatusExt {
 
     /// If the process was terminated by a signal, returns that signal.
     ///
-    /// Ie, if `WIFSIGNALED`, this returns `WTERMSIG`.
+    /// In other words, if `WIFSIGNALED`, this returns `WTERMSIG`.
     #[stable(feature = "rust1", since = "1.0.0")]
     fn signal(&self) -> Option<i32>;