How to insert a text link in Slack with the keyboard?

One can do some inline formatting with the keyboard in Slack:
*bold*, _italics_, ~strikethrough~ and inline code with backquotes as in SE.
Simple weblinks do work as-is.

But how to make a weblink with text like this unhelpful one when the Format messages with markup Slack preference is enabled and thus the text formatting toolbar isn’t shown ?
Markdown (Text)(URL), Textile (Redmine) "Text":URL and MediaWiki (URL|Text) all do not work.

Is there some documentation describing the Slack markup syntax ? I did not find any in Slack.