Only <p> and <empty-line /> are allowed in titles,
but <p> has the same type as an ordinary paragraphs.
Therefore, there is no need to remove emphasis from titles.
Also, don't intersperse paragraph with empty lines.
<annotation> is not allowed inside <body> according to FictionBook2 XML schema. Besides that, the same information is already placed inside <description>.
Related bug: #2424
Note that as a result of this change, the following,
which formerly produced a header with two lines separated
by a line break, will now produce a header followed by a
paragraph:
# Hi\
there
This may affect some existing documents that relied on
this undocumented and unintended behavior.
This change makes pandoc more consistent with other
Markdown implementations, and with itself (since the two-space
version of a line break doesn't work inside ATX headers, and
neither version works inside Setext headers).
Closes#3730.
