Verifies that after inserting a newline after a period doesn't insert an extra space in front of the newly inserted line.
| <!DOCTYPE html>
| <html>
|   <head>
|     "\n    "
|     "\n    "
|     "\n"
|   "\n"
|   <body>
|     "\n    "
|     <div>
|       class="container"
|       "Hello."
|     <div>
|       class="container"
|       "<#selection-caret>This is a test."
|     "\n\n\n"