Remove trailing whitespace

Remove two instances of trailing whitespace character.

.github/workflows/rust.yml

@@ -1,3 +1,4 @@
+
 on: [push, pull_request]
 
 name: Continuous integration
@@ -11,7 +12,7 @@ jobs:
         rust:
           - nightly
     steps:
-      - name: Checkout Crate 
+      - name: Checkout Crate
         uses: actions/checkout@v2
       - name: Checkout Toolchain
         uses: actions-rs/toolchain@v1