This is causing the "command '' not found" errors that we've been
seeing, specifically reported in microsoft/vscode-go#2920.
Also, fixed an issue with import organization in single-line files that
was caught as a result of this.
Change-Id: I2dfedb5d1b8dda976f356b0d6fcd146e53f1a650
Reviewed-on: https://go-review.googlesource.com/c/tools/+/209219
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>