[ccan] Test failure

[Ian Zimmerman]

Trying to run make check on current master, I get:

[many successful tests snipped]

tools/ccanlint/ccanlint -s --deps-fail-ignore   ccan/io/ && touch ccan/io/.ok
io: Module examples with expected output give that output (examples_run): FAIL
/tmp/ccanlint-24192.1804289383/example-_info-io.c:2:output '' didn't match 'tr a-z a-z'

io: Total score: 82/87 FAIL!
make: *** [Makefile:78: ccan/io/.ok] Error 1

What's up?

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