v0.0-382-gf605175: PR #295: Use absl::Status in file operations.
This is an un-changed fresh one-patch version of #294 - the other one had issues while importing due to frequent master-refreshes ? Not clear. GitHub PR https://github.com/google/verible/pull/295 Copybara import of the project: - 07ac2127da6267c767dfbd6fbde4ef649617dea1 Use absl::Status in file operations. by Henner Zeller <[email protected]> Closes #295 PiperOrigin-RevId: 310573302