Cannot parse appdata ITS file

[muelli]

This may well be a bug in the Appdata pages.
Currently, https://www.freedesktop.org/software/appstream/docs/sect-Quickstart-Translation.html states:

4.4.3. Translating using Itstool
You can also use Itstool for translation. In order to translate an XML file with it, you need an .its file with translation definitions. An appropriate file for AppStream upstream metadata of any kind can be found here:

​
​<its:rules
​ xmlns:its="http://www.w3.org/2005/11/its"
​ version="1.0">
​ <its:translateRule translate="no" selector="/component"/>
​ <its:translateRule translate="yes"
​ selector="/component/name | /component/summary |
​ /component/description | /component/screenshots/screenshot/caption | /component/developer_name"/>
​</its:rules>

When saving that file, I cannot use it with 2.0.2 nor 2.0.4:

✗>itstool --its=as-metainfo.its  /usr/share/appdata/eog.appdata.xml 
Traceback (most recent call last):
  File "/usr/bin/itstool", line 1477, in <module>
    doc.apply_its_file(itsfile, params=params)
  File "/usr/bin/itstool", line 729, in apply_its_file
    doc = libxml2.parseFile(filename)
  File "/usr/lib/python2.7/dist-packages/libxml2.py", line 1343, in parseFile
    if ret is None:raise parserError('xmlParseFile() failed')
libxml2.parserError: xmlParseFile() failed

I expected it to work fine.

[enz]

I run into the same problem and the problem occurs because lines in the example from the HTML page have an extra Unicode zero-width space (U+200B) at the beginning. If you remove those, it runs fine for me. Not sure why those characters exist in the documentation, it would be nice if copying/pasting the example would just work.