Empty link breaks backslash newline

[justanotheranonymoususer]

Version: 9a88ce1

import markdown2

# Empty link breaks backslash newline.
#
# Expected:
# <p><a href="">link</a></p>
#
# <p>one<br />
# two</p>
#
# Actual:
# <p><a href="">link</a></p>
#
# <p>one
# two</p>
markdown_text = R"""
[link]()

one\
two
"""
print(markdown2.markdown(markdown_text, extras={'breaks': {'on_backslash': True}}))