Do not fail on blank lines with whitespace only

[homiak]

It's pretty easy to leave a single tab on a line after editing a large properties file. I think the parser should simply ignore such a line instead of failing.

[magiconair]

Sorry for the late reply. This fell through the vacation crack.

The parser does indeed not ignore a blank line with only whitespace.

[magiconair]

Thanks for reporting this @homiak

[homiak]

Thank you! @magiconair