Convert a Slim file and output to prettified HTML

Convert Slim files to HTML.
More information: <https://rdoc.info/gems/slim/frames#slim-command-slimrb>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

slimrb --pretty {{input.slim}} {{output.html}}

click the source code to copy install slimrb on any operating system with command-not-found.com