Copy and paste sometimes removes spaces between words.

Source/core/editing/TextIterator.h

 /*
  * Copyright (C) 2004, 2006, 2009 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
 enum TextIteratorBehavior {
     TextIteratorDefaultBehavior = 0,
     TextIteratorEmitsCharactersBetweenAllVisiblePositions = 1 << 0,
     TextIteratorEntersTextControls = 1 << 1,
     TextIteratorIgnoresStyleVisibility = 1 << 2,
     TextIteratorEmitsOriginalText = 1 << 3,
     TextIteratorStopsOnFormControls = 1 << 4,
     TextIteratorEmitsImageAltText = 1 << 5,
     TextIteratorEntersAuthorShadowRoots = 1 << 6,
     TextIteratorEmitsObjectReplacementCharacter = 1 << 7,
-    TextIteratorDoesNotBreakAtReplacedElement = 1 << 8
+    TextIteratorDoesNotBreakAtReplacedElement = 1 << 8,
+    TextIteratorBehavesAsIfNodesFollowing = 1 << 9,
 };
 typedef unsigned TextIteratorBehaviorFlags;
 
 String plainText(const Range*, TextIteratorBehaviorFlags = TextIteratorDefaultBehavior);
 String plainText(const Position& start, const Position& end, TextIteratorBehaviorFlags = TextIteratorDefaultBehavior);
 PassRefPtrWillBeRawPtr<Range> findPlainText(const Range*, const String&, FindOptions);
 void findPlainText(const Position& inputStart, const Position& inputEnd, const String&, FindOptions, Position& resultStart, Position& resultEnd);
 
 class BitStack {
 public:
@@ skipping 165 matching lines @@
     // Used when m_stopsOnFormControls is set to determine if the iterator should keep advancing.
     bool m_shouldStop;
 
     bool m_emitsImageAltText;
 
     bool m_entersAuthorShadowRoots;
 
     bool m_emitsObjectReplacementCharacter;
 
     bool m_breaksAtReplacedElement;
+
+    bool m_hasNodesFollowing;
 };
 
 // Iterates through the DOM range, returning all the text, and 0-length boundaries
 // at points where replaced elements break up the text flow. The text comes back in
 // chunks so as to optimize for performance of the iteration.
 class SimplifiedBackwardsTextIterator {
     STACK_ALLOCATED();
 public:
     explicit SimplifiedBackwardsTextIterator(const Range*, TextIteratorBehaviorFlags = TextIteratorDefaultBehavior);
     SimplifiedBackwardsTextIterator(const Position& start, const Position& end, TextIteratorBehaviorFlags = TextIteratorDefaultBehavior);
@@ skipping 156 matching lines @@
 private:
     Vector<UChar> m_buffer;
     // Did we have to look ahead in the textIterator to confirm the current chunk?
     bool m_didLookAhead;
     TextIterator m_textIterator;
 };
 
 }
 
 #endif