Formatter either adds or removes content in malformed xml

[fbricon]

In this document, a closing bracket is missing L8:

<?xml version="1.0" encoding="UTF-8"?>
<resources something="foo">
  <resource name="res00">
    <property name="propA" value="..."/>
    <property name="propB" value="..."/>
  </resource>
  <resource ddd="ddd" name="">
    <property name="one" value="..."
    <property name="two" value="..."/>
  </resource>
</resources>

When invoking the formatter, a closing bracket is added:

Here, closing bracket is also missing L8:

<web-app 
         xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
		 http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
         <servlet>
             <servlet-name>sssi</servlet-name>
         </servlet
</web-app>

But then, the formatter removes the line completely!

[fbricon]

In this case (missing bracket L9), the formatter works as expected:

<?xml version="1.0" encoding="UTF-8"?>
<resources something="foo">
    <resource name="res00">
        <property name="propA" value="..."/>
        <property name="propB" value="..."/>
    </resource>
    <resource ddd="ddd" name="">
        <property name="one" value="..."/>
        <property name="two" value="..."
    </resource>
</resources>

[fbricon]

Looks like malformed closing tags of enclosing elements get removed