[Eryx-Z]

Fixes #1879.

generate_revision() passed the revision message straight into script.py.mako, which embeds it in a triple-quoted module docstring. A message containing """ could close that docstring early so the remainder ran as Python when the revision was imported, and backslashes were interpreted as escape sequences so script.doc did not round-trip.

Escape backslashes and triple quotes in _escape_docstring_message() before rendering (covers built-in templates and custom script.py.mako copies).

Test

• test_create_script_message_with_triple_quotes
• test_create_script_message_with_backslashes
• Existing RevisionCommandTest::test_create_script_basic still passes

[sqla-tester]

Hi, and thanks for the pull request!

This project accepts pull requests only for issues that a maintainer has already marked with the open for pull requests label. That way we can settle on an approach before anyone spends time writing code.

This pull request references issue #1879, which hasn't been marked open for pull requests, so the change isn't authorized yet and I'm closing it automatically. Once a maintainer adds the label to #1879, reopen this pull request and it will stay open. If #1879 needs more detail before that can happen, a complete runnable example is usually the missing piece, and adding one to the issue is the fastest way to get there.

This is automatic and procedural. It isn't a judgment on your change, and nothing you've written here is lost.

Thanks for your interest in the project!