doc: fix typos

src/Terminal.ts

@@ -1391,7 +1391,7 @@ export class Terminal extends EventEmitter implements ITerminal, IDisposable, II
    * processed by the terminal and what keys should not.
    * @param customKeyEventHandler The custom KeyboardEvent handler to attach.
    * This is a function that takes a KeyboardEvent, allowing consumers to stop
-   * propogation and/or prevent the default action. The function returns whether
+   * propagation and/or prevent the default action. The function returns whether
    * the event should be processed by xterm.js.
    */
   public attachCustomKeyEventHandler(customKeyEventHandler: CustomKeyEventHandler): void {

src/common/EventEmitter.ts

@@ -23,7 +23,7 @@ export class EventEmitter extends Disposable implements IEventEmitter, IDisposab
   }
 
   /**
-   * Adds a disposabe listener to the EventEmitter, returning the disposable.
+   * Adds a disposable listener to the EventEmitter, returning the disposable.
    * @param type The event type.
    * @param handler The handler for the listener.
    */

src/ui/Lifecycle.ts

@@ -6,7 +6,7 @@
 import { IDisposable } from 'xterm';
 
 /**
- * Adds a disposabe listener to a node in the DOM, returning the disposable.
+ * Adds a disposable listener to a node in the DOM, returning the disposable.
  * @param type The event type.
  * @param handler The handler for the listener.
  */