EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
This test uses FormatBlock with html brackets in the tag string passed to execCommand.

Before FormatBlock with <h1>:
| "
Format Me
"

After FormatBlock with <h1>:
| <h1>
|   "
<#selection-caret>Format Me
"