Add doc comment

Author: Jamesbarford

database/src/lib.rs

@@ -1039,9 +1039,13 @@ impl BenchmarkRequest {
     }
 }
 
+/// Result of inserting into the database
 #[derive(Debug, Clone, PartialEq)]
 pub enum BenchmarkRequestInsertResult {
+    /// The request was inserted into the database and is a unique instance
     Inserted,
+    /// The request was not inserted into the database as something else already
+    /// existed that clashed with the unique clause
     NothingInserted,
 }
 

site/src/request_handlers/github.rs

@@ -102,7 +102,8 @@ async fn record_try_benchmark_request_without_artifacts(
             log::info!(
                 "Failed to insert try benchmark request, a request for PR`#{pr}` already exists"
             );
-            format!("This pull request was already queued before and is awaiting a try build to finish.")
+            "This pull request was already queued before and is awaiting a try build to finish."
+                .to_string()
         }
         Ok(BenchmarkRequestInsertResult::Inserted) => get_awaiting_on_bors_message(),
         Err(e) => {