tests/run-make/multiline-args-value/check-cfg-frontmatter.stderr

error: invalid `--check-cfg` argument: `---
       ---
       cfg(key)`
  |
  = note: expected `cfg(name, values("value1", "value2", ... "valueN"))`
  = note: visit <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more details