In the manual of Gist.vim, it’s said that after opening the Gist
buffer in Vim, one can add/change the description of a Gist with
:Gist -e -s something. To add a description for a Gist, I typed
:Gist -s foo bar ... in a buffer for the particular Gist — I
tried to use it like
:!echo foo bar — and what I got in the list
of my Gists was just the last word.
After one encounters such a problem, he/she will be likely to solve the problem within seconds: use a double quote to surround the whole description.
When I was in doubt of the words in the manual, I used simple examples for testing, so I could quickly see the output and get the concepts written in the documentation.