spurious hard break after html tag

[step-]

New after 64f3680: a spurious hard break is added in five cases below (all lines end with whitespace).

test subject:

<a name=""></a>      
<a name="n"></a>     
<a name="sp"></a>    
     <a name=""></a>     
     <a name="n"></a>    
     <a name="sp" > </a>     

expected output (cmark output)

<a name=""></a>
<a name="n"></a>
<a name="sp"></a>
<a name=""></a>
<a name="n"></a>

actual output: (md2html output)

<a name=""></a><br />
<a name="n"></a><br />
<a name="sp"></a><br />
<a name=""></a><br />
<a name="n"></a><br />

Versions tested:

• cmark 0.31.0-2-g3337a30
• md2html release-0.5.1-46-g3848bfb

Command options:

• cmark --usafe
• md2html --xhtml

[step-]

Thank you. Fix confirmed in my test suite.