\unset ECHO

1|render with no tplname uses the unnamed default slot|unnamed

2|named template renders one jsonb value|<ul><li>Yehuda Katz</li></ul>
3|same named template, second jsonb value|<ul><li>Carl Lerche</li><li>Alan Johnson</li></ul>

4|re-preparing an existing tplname replaces it rather than leaking the old one|fresh
5|forget removes a known tplname|t
6|forget on an already-unknown tplname returns false|f
ERROR:  unknown prepared mustach template "people"
ERROR:  unknown prepared mustach template "doesnotexist"

9|render can write the result to a server file instead of returning it|t
10|file content written by render|b
ERROR:  permission denied to write server file
DETAIL:  Only superusers may write files with mustach_json.
12|a bare positional 2nd argument is the file overload, not tplname|t
13|positional call wrote a file|yes
14|forget on the unnamed default slot returns true once|t
15|forget on the already-empty unnamed default slot returns false|f
ERROR:  no prepared mustach template