Incorrect parsing

[aprescott]

I'm sure there are others, but:

html2md = Html2Md.new("<p><strong>hi</strong> <b>there</b> foo</p>")
#=> #<Html2Md:0x0000000269f210 @options={}, @source="<p><strong>hi</strong> <b>there</b> foo</p>"> 
html2md.parse
#=> "**hi**there foo\n\n" 

Output should be **hi** **there** foo.