en-US should be default source language

[regisd]

Steps

./md2xliff/bin/extract myfile.md

Produces

• myfile.skl.md
• myfile.xlf

Actual:
myfile.xlf starts with

?xml version="1.0" encoding="UTF-8"?>
<xliff xmlns="urn:oasis:names:tc:xliff:document:1.2" version="1.2">
  <file original="jflex/docs/md/installing.md"
    source-language="ru-RU" target-language="en-US" datatype="markdown">

Source is typically in English, I expected instead

source-language="en-US"

[aeromusek]

You can override this pretty easily: just change your command from

./md2xliff/bin/extract myfile.md

to

./md2xliff/bin/extract myfile.md myfile.xlf myfile.skl.md en-US [target language code]