check.txt

# check "first"
# check "third"
first
second
third
; check [[
; ✔️ match at <out>:3:1-3:6:
;   first
; 
; stack trace:
;   test-data/pass/check.txt:1 in <main>
; ]]
; check [[
; ✔️ match at <out>:5:1-5:6:
;   third
; 
; stack trace:
;   test-data/pass/check.txt:2 in <main>
; ]]