message: Avoid testing git-specific error messages
diff: @@ -320,30 +320,7 @@ Caused by:
  p.cargo("build -v")
  .with_status(101)
  - .with_stderr(
  - "\
  -[UPDATING] git repository `ssh://needs-proxy.invalid/git`
  -[RUNNING] `git fetch[..]
  -[ERROR] failed to get `foo` as a dependency of package `foo v0.0.0 [..]`
  -
  -Caused by:
  - failed to load source for dependency `foo`
  -
  -Caused by:
  - Unable to update ssh://needs-proxy.invalid/git
  -
  -Caused by:
  - failed to fetch into: [..]
  -
  -Caused by:
  - [..]process didn't exit successfully[..]
  ---- stderr
  -ssh: Could not resolve hostname[..]
  -fatal: [..]
  -
  -Please make sure you have the correct access rights
  -and the repository exists.
  -[..]",
  - )
  + .with_stderr_contains("[..]Unable to update[..]")
  + .with_stderr_does_not_contain("[..]try enabling `git-fetch-with-cli`[..]")
  .run();
  }
  