[err0r4eve3]

Summary

• route byte-slice writes through extraIndenter.WriteByte, matching its existing string path
• add a regression case for nested <<- heredocs

The bug is specific to nesting because an inner extraIndenter flushes each completed line with e.bufWriter.Write. When that underlying writer is an outer extraIndenter, its embedded Write method was promoted and bypassed the outer writer's per-line indentation state. Implementing Write on extraIndenter keeps every writer entry point on the same path.

Test

• go test ./...

Fixes #1403

[milhnl]

?

[mvdan]

Let's pretend you did not just copy paste someone else's patch and put your name on it.

[err0r4eve3]

You are right. This PR reproduced the patch @milhnl had already posted in #1403, including the regression test, and I failed to credit that source before submitting it. I apologize to @milhnl and the maintainers. The attribution failure is entirely mine. The PR is closed, and I will not submit further work to this repository.