[gardening] "github" → "GitHub". "foo </bar>" → "foo</bar>". Newline …

…at EOF.

.github/PULL_REQUEST_TEMPLATE.md

@@ -12,10 +12,9 @@ Before merging this pull request to apple/swift repository:
 - [ ] Test pull request on Swift continuous integration.
 
 <details>
-  <summary>Triggering Swift CI </summary>
-
-The swift-ci is triggered by writing a comment on this PR addressed to the github user @swift-ci. Different tests will run depending on the specific comment that you use. The currently available comments are:
+  <summary>Triggering Swift CI</summary>
 
+The swift-ci is triggered by writing a comment on this PR addressed to the GitHub user @swift-ci. Different tests will run depending on the specific comment that you use. The currently available comments are:
 
 **Smoke Testing**
 
@@ -35,4 +34,4 @@ The swift-ci is triggered by writing a comment on this PR addressed to the githu
 
 Note: Only members of the Apple organization can trigger swift-ci.
 </details>
-<!-- Thank you for your contribution to Swift! -->
+<!-- Thank you for your contribution to Swift! -->