✏️ Add spaces around em dashes

examples/02_02_future_trait/src/lib.rs

@@ -37,7 +37,7 @@ impl SimpleFuture for SocketRead<'_> {
 
     fn poll(&mut self, wake: fn()) -> Poll<Self::Output> {
         if self.socket.has_data_to_read() {
-            // The socket has data-- read it into a buffer and return it.
+            // The socket has data -- read it into a buffer and return it.
             Poll::Ready(self.socket.read_buf())
         } else {
             // The socket does not yet have data.
@@ -89,7 +89,7 @@ where
         }
 
         if self.a.is_none() && self.b.is_none() {
-            // Both futures have completed-- we can return successfully
+            // Both futures have completed -- we can return successfully
             Poll::Ready(())
         } else {
             // One or both futures returned `Poll::Pending` and still have
@@ -121,7 +121,7 @@ where
     fn poll(&mut self, wake: fn()) -> Poll<Self::Output> {
         if let Some(first) = &mut self.first {
             match first.poll(wake) {
-                // We've completed the first future-- remove it and start on
+                // We've completed the first future -- remove it and start on
                 // the second!
                 Poll::Ready(()) => self.first.take(),
                 // We couldn't yet complete the first future.

examples/06_03_select/src/lib.rs

@@ -112,7 +112,7 @@ async fn run_loop(
                 }
             },
             new_num = get_new_num_fut => {
-                // A new number has arrived-- start a new `run_on_new_num_fut`,
+                // A new number has arrived -- start a new `run_on_new_num_fut`,
                 // dropping the old one.
                 run_on_new_num_fut.set(run_on_new_num(new_num).fuse());
             },
@@ -165,7 +165,7 @@ async fn run_loop(
                 }
             },
             new_num = get_new_num_fut => {
-                // A new number has arrived-- start a new `run_on_new_num_fut`.
+                // A new number has arrived -- start a new `run_on_new_num_fut`.
                 run_on_new_num_futs.push(run_on_new_num(new_num));
             },
             // Run the `run_on_new_num_futs` and check if any have completed