Please check if the XML is valid

[ngapp-dev]

Describe the bug
The bug happens if rss feed has some spaces before tags. It thows exception from AndroidXmlParser:

throw RssParsingException(
                message = "Something went wrong during the parsing of the feed. Please check if the XML is valid",
                cause = exception
            )

Like an example https://metan.by/news/rss/
If artificially create a feed with missing indents in front, everything works.

The link of the RSS Feed
RSS feed caused bug is https://metan.by/news/rss/

[prof18]

The issue has been fixed with #172

I will release a new version soon