message: Let two further tests tolerate col info in panics
  Needed by
  I've now ripgrepped for "panicked at" and found no further
  test that hardcodes the "filename:line$" format.
diff: @@ -263,7 +263,7 @@ failures:
  ---- test_hello stdout ----
  <tab>thread 'test_hello' panicked at 'assertion failed: false', \
  - tests[/]footest.rs:4
  + tests[/]footest.rs:4[..]
  ")
  .with_stdout_contains("\
  failures:
  @@ -295,7 +295,7 @@ failures:
  ---- test_hello stdout ----
  <tab>thread 'test_hello' panicked at 'assertion failed: false', \
  - src[/]lib.rs:4
  + src[/]lib.rs:4[..]
  ")
  .with_stdout_contains("\
  failures:
  