There was already handling in isClosingErr for errors from Stdin/Stdout
and TCP connections. Add handling for io.Pipe closing errors.
Change-Id: I8d171ab49a3fffe0fca9f0482f6b92d61b1fae1f
Reviewed-on: https://go-review.googlesource.com/c/tools/+/320849
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>