This tests ensures formatBlock do not make multiple elements when formatting multiple paragraphs.

Formatting:
| "\n"
| <div>
|   "<#selection-anchor>hello"
| <div>
|   "world"
| <div>
|   "WebKit<#selection-focus>"
| "\n"

by p yields:
| "\n"
| <p>
|   "<#selection-anchor>hello"
|   <br>
|   "world"
|   <br>
|   "WebKit<#selection-focus>"
| "\n"

Formatting:
| "\n"
| <p>
|   "<#selection-anchor>hello"
| <p>
|   "world<#selection-focus>"
| "\n"

by blockquote yields:
| "\n"
| <blockquote>
|   "<#selection-anchor>hello"
|   <br>
|   "world<#selection-focus>"
| "\n"

Formatting:
| "\n"
| <div>
|   "<#selection-anchor>hello"
|   <pre>
|     "world<#selection-focus>"
| "\n"

by p yields:
| "\n"
| <p>
|   "<#selection-anchor>hello"
|   <br>
|   "world<#selection-focus>"
| "\n"

Formatting:
| "\n"
| <h1>
|   "<#selection-anchor>hello"
| <div>
|   <h2>
|     "world"
|   <h3>
|     "WebKit<#selection-focus>"
| "\n"

by pre yields:
| "\n"
| <pre>
|   "<#selection-anchor>hello"
|   <br>
|   "world"
|   <br>
|   "WebKit<#selection-focus>"
| "\n"

Formatting:
| "\n"
| <div>
|   "hello"
|   <p>
|     "<#selection-anchor>world"
|   "webki<#selection-focus>t"
| "\n"

by h1 yields:
| "\n"
| <div>
|   "hello"
|   <h1>
|     "<#selection-anchor>world"
|     <br>
|     "webkit<#selection-focus>"
| "\n"

Formatting:
| "\n"
| <pre>
|   "<#selection-anchor>hello\nworld<#selection-focus>\nwebkit\n"
| "\n"

by blockquote yields:
| "\n"
| <pre>
|   <blockquote>
|     "<#selection-anchor>hello"
|     <br>
|     "world<#selection-focus>"
|   "webkit\n"
| "\n"

Formatting:
| "\n"
| <pre>
|   "hello\n<#selection-anchor>world\nwebki<#selection-focus>t\n"
| "\n"

by blockquote yields:
| "\n"
| <pre>
|   "hello\n"
|   <blockquote>
|     "<#selection-anchor>world"
|     <br>
|     "webki<#selection-focus>t"
| "\n"

Formatting:
| "\n<#selection-anchor>hello"
| <p>
|   "world<#selection-focus>"
| <p>
|   "webkit"
| "\n\n"

by pre yields:
| <pre>
|   "<#selection-anchor>\nhello"
|   <br>
|   "worl<#selection-focus>d"
| <p>
|   "webkit"
| "\n\n"

Formatting:
| "\n"
| <div>
|   "hello"
| <div>
|   "<#selection-anchor>world"
| <div>
|   "webki<#selection-focus>t"
| "\n"

by pre yields:
| "\n"
| <div>
|   "hello"
| <pre>
|   "<#selection-anchor>world"
|   <br>
|   "webki<#selection-focus>t"
| "\n"

Formatting:
| "\n"
| <ul>
|   <li>
|     "<#selection-anchor>hello"
|   <li>
|     "world<#selection-focus>"
| "\n"

by blockquote yields:
| "\n"
| <blockquote>
|   <ul>
|     <li>
|       "<#selection-anchor>hello"
|   <ul>
|     <li>
|       "world<#selection-focus>"
| "\n"