commit 0c09ff325ac41535a3d5fb6d539c32aca981bada
author Rob Pike <r@golang.org> Fri Mar 27 13:47:18 2015 -0700
committer Rob Pike <r@golang.org> Fri Mar 27 21:01:39 2015 +0000
tree 80027fd75decde4dd4ee9485ad0f15b91b0c25ee
parent 1e216dc2e33abac72c076ca48ead2dcb476c2ddc

cmd/cover: preserve //go: comments

Cover deleted all comments because they can break the simple way that
counters are injected into the rewritten source. But //go: comments have
semantic value, and for instance go test -cover runtime fails during
compilation because of their absence from the annotated source.

We can keep the //go: comments because they are at the beginning of
the line and are not affected by our counter injection.

Fixes #10270.

After this CL, go test -cover runtime works.
A testing strategy that does not involve a golden file would be welcome
but I can't think of one.

Change-Id: I73f7b7a36383a8efed8e33fa2414cd0eac7d015a
Reviewed-on: https://go-review.googlesource.com/8173
Reviewed-by: Robert Griesemer <gri@golang.org>