Don't inherit block style if text is inserted after paragraph selection.

Source/core/editing/InsertTextCommand.cpp

Index: Source/core/editing/InsertTextCommand.cpp
diff --git a/Source/core/editing/InsertTextCommand.cpp b/Source/core/editing/InsertTextCommand.cpp
index 80de425f85612d8064d5acfe1d89ec67190a2ea2..a0d98e2bc83c508659974117e7dae47eabd3cd63 100644
--- a/Source/core/editing/InsertTextCommand.cpp
+++ b/Source/core/editing/InsertTextCommand.cpp
@@ -130,12 +130,17 @@ void InsertTextCommand::doApply()
     if (endingSelection().isRange()) {
         if (performTrivialReplace(m_text, m_selectInsertedText))
             return;
+        bool endOfSelectionWasAtStartOfBlock = isStartOfBlock(endingSelection().visibleEnd());
         deleteSelection(false, true, false, false);
         // deleteSelection eventually makes a new endingSelection out of a Position. If that Position doesn't have
         // a renderer (e.g. it is on a <frameset> in the DOM), the VisibleSelection cannot be canonicalized to
         // anything other than NoSelection. The rest of this function requires a real endingSelection, so bail out.
         if (endingSelection().isNone())
             return;
+        if (endOfSelectionWasAtStartOfBlock) {
+            if (EditingStyle* typingStyle = document().frame()->selection().typingStyle())
+                typingStyle->removeBlockProperties();
+        }
     } else if (document().frame()->editor().isOverwriteModeEnabled()) {
         if (performOverwrite(m_text, m_selectInsertedText))
             return;