terraform_docsfails with invalid command code R

[cschroer]

Describe the bug

In PR #701, the usage of sed was introduced to the terraform_docs for in-file changes.

MacOS requires an extension for the -i parameter, unlike GNU sed.
As a result the hook fails on MacOS know with the following error:

Terraform docs..........................................................................Failed
- hook id: terraform_docs
- exit code: 1

sed: 1: "README.md": invalid command code R

How can we reproduce it?

Use MacOS to run the terraform_docs hook.

Environment information

• OS: MacOS
• Darwin MB-PRO.local 23.6.0 Darwin Kernel Version 23.6.0: Mon Jul 29 21:13:04 PDT 2024; root:xnu-10063.141.2~1/RELEASE_ARM64_T6020 arm64

[yermulnik]

@cschroer Thanks for catching this. I requested changes in PR of yours (#704) to simplify solution and make it "compatible" on both GNU and POSIX sed.