third_party/WebKit: fix typos found in comments

third_party/WebKit/Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1114 matching lines @@
     RefPtrWillBeRawPtr<EditingStyle> typingStyle = nullptr;
     if (frame().selection().typingStyle()) {
         typingStyle = frame().selection().typingStyle()->copy();
         typingStyle->overrideWithStyle(style);
     } else {
         typingStyle = EditingStyle::create(style);
     }
 
     typingStyle->prepareToApplyAt(frame().selection().selection().visibleStart().deepEquivalent(), EditingStyle::PreserveWritingDirection);
 
-    // Handle block styles, substracting these from the typing style.
+    // Handle block styles, subtracting these from the typing style.
     RefPtrWillBeRawPtr<EditingStyle> blockStyle = typingStyle->extractAndRemoveBlockProperties();
     if (!blockStyle->isEmpty()) {
         ASSERT(frame().document());
         ApplyStyleCommand::create(*frame().document(), blockStyle.get(), editingAction)->apply();
     }
 
     // Set the remaining style as the typing style.
     frame().selection().setTypingStyle(typingStyle);
 }
 
@@ skipping 155 matching lines @@
 }
 
 DEFINE_TRACE(Editor)
 {
     visitor->trace(m_frame);
     visitor->trace(m_lastEditCommand);
     visitor->trace(m_mark);
 }
 
 } // namespace blink