Doesn't generate feeds for tags that include spaces

[collopy]

If tags: true is set, jekyll-feed does not generate feeds for tags that include spaces, such as “mind sciences”. One can generate a list of tag feeds in head using something like:

`{% capture tags %}{% for tag in site.tags %}{{ tag[0] }}|{% endfor %}{% endcapture %} {% assign sortedtags = tags | split:'|' | sort_natural %} {% for tag in sortedtags %}

{% endfor %}`

Since jekyll-feed omits tags with spaces in their names, though, URLs like https://collopy.net/feed/subjects/mind-sciences.xml appear in the list but resolve to 404.

[collopy]

This is a duplicate of issue 377.