gh-md cannot render table on Windows

[tuhdo]

Run gh-md-render-region on markdown table like this:

    Key Binding       |                 Description
----------------------|------------------------------------------------------------
<kbd>SPC m h h</kbd>  | cider doc
<kbd>SPC m h g</kbd>  | cider grimoire
<kbd>SPC m h j</kbd>  | cider javadoc

resulted in a blank buffer.