EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
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          text run at (0,0) width 761: "When the selection to delete ends at the end of a paragraph, that paragraph will be completely deleted, but a <br> or an empty"
          text run at (0,20) width 489: "block will remain. Merging must happen to remove that <br> or prune that block."
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          text run at (0,0) width 757: "This test illustrates a case where merging wasn't allowed to happen just because the end of the selection to delete was in a fully"
          text run at (0,20) width 192: "selected line, which is nonsense."
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          text run at (0,0) width 296: "Fixing that bug exposed a problem with merging. "
          text run at (295,0) width 488: "If deletion empties out the block that contained the start of the selection to delete,"
          text run at (0,20) width 410: "that block can collapse away and become impossible to merge into. "
          text run at (409,20) width 362: "So we insert a placeholder to prop it open so that the merge"
          text run at (0,40) width 73: "can happen."
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