Input Text shows Russian characters as question marks in a report

[php-coder]

When I use Input Text with Russian characters, they are displayed as questions in the report:

The same problem in the target/robotframework-reports/output.xml file:

<kw library="Selenium2Library" name="Input Text">
  <doc>Types the given &lt;b&gt;text&lt;/b&gt; into the text field identified by</doc>
  <arguments> 
    <arg>id=nameRu</arg>
    <arg>Космос</arg>
  </arguments>
  <msg level="INFO" timestamp="20170301 20:00:20.375">Typing text '??????' into text field 'id=nameRu'</msg>
  <status endtime="20170301 20:00:20.413" starttime="20170301 20:00:20.369" status="PASS"/>
</kw>