Run rust fmt.

src/database/message.rs

@@ -1,5 +1,5 @@
-use serde::{ Deserialize, Serialize };
-use bson::{ UtcDateTime };
+use bson::UtcDateTime;
+use serde::{Deserialize, Serialize};
 
 #[derive(Serialize, Deserialize, Debug)]
 pub struct PreviousEntry {
@@ -10,13 +10,13 @@ pub struct PreviousEntry {
 #[derive(Serialize, Deserialize, Debug)]
 pub struct Message {
     #[serde(rename = "_id")]
-	pub id: String,
-	// pub nonce: String, used internally
-	pub channel: String,
-	pub author: String,
+    pub id: String,
+    // pub nonce: String, used internally
+    pub channel: String,
+    pub author: String,
 
-	pub content: String,
+    pub content: String,
     pub edited: Option<UtcDateTime>,
-    
-    pub previous_content: Option<Vec<PreviousEntry>>
+
+    pub previous_content: Option<Vec<PreviousEntry>>,
 }