Merge pull request #5080 from Carreau/removed-is-array

[CodeMirror] removed is actually a list of string.

codemirror/codemirror.d.ts

@@ -602,7 +602,7 @@ declare module CodeMirror {
         /** Array of strings representing the text that replaced the changed range (split by line). */
         text: string[];
         /**  Text that used to be between from and to, which is overwritten by this change. */
-        removed: string;
+        removed: string[];
         /**  String representing the origin of the change event and wether it can be merged with history */
         origin: string;
     }