# check "first"
# check "fourth"
first
second
third
; check [[
; Check failed! Passing checks:
; ✔️ match at <out>:3:1-3:6:
;   first
; 
; stack trace:
;   test-data/fail/check.txt:1 in <main>
; ]]
; 
; check [[
; Failing check:
; ❌ no match at <out>:3:6:
;   
;   second
;   third
;   
;   ...
; 
; stack trace:
;   test-data/fail/check.txt:2 in <main>
; ]]