Fix a bunch of linting errors

eslint --fix and a few manual ones

src/autocomplete/AutocompleteProvider.js

@@ -26,7 +26,7 @@ export default class AutocompleteProvider {
         }
 
         commandRegex.lastIndex = 0;
-        
+
         let match;
         while ((match = commandRegex.exec(query)) != null) {
             let matchStart = match.index,

src/autocomplete/CommandProvider.js

@@ -83,7 +83,7 @@ export default class CommandProvider extends AutocompleteProvider {
 
     static getInstance(): CommandProvider {
         if (instance == null)
-            instance = new CommandProvider();
+            {instance = new CommandProvider();}
 
         return instance;
     }

src/autocomplete/DuckDuckGoProvider.js

@@ -13,7 +13,7 @@ export default class DuckDuckGoProvider extends AutocompleteProvider {
     constructor() {
         super(DDG_REGEX);
     }
-    
+
     static getQueryUri(query: String) {
         return `https://api.duckduckgo.com/?q=${encodeURIComponent(query)}`
          + `&format=json&no_redirect=1&no_html=1&t=${encodeURIComponent(REFERRER)}`;

src/autocomplete/EmojiProvider.js

@@ -44,7 +44,7 @@ export default class EmojiProvider extends AutocompleteProvider {
 
     static getInstance() {
         if (instance == null)
-            instance = new EmojiProvider();
+            {instance = new EmojiProvider();}
         return instance;
     }
 

src/autocomplete/RoomProvider.js

@@ -52,12 +52,12 @@ export default class RoomProvider extends AutocompleteProvider {
     getName() {
         return '💬 Rooms';
     }
-    
+
     static getInstance() {
         if (instance == null) {
             instance = new RoomProvider();
         }
-        
+
         return instance;
     }