sweet/common/diagnostics: gofmt format

Change-Id: Ia7734b408fa24d3abee6f25d47dfa85715084ed9
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/520737
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
diff --git a/sweet/common/diagnostics/config.go b/sweet/common/diagnostics/config.go
index 10f3dea..c3739f8 100644
--- a/sweet/common/diagnostics/config.go
+++ b/sweet/common/diagnostics/config.go
@@ -141,7 +141,7 @@
 // ParseConfig derives a Config from a string. The string must take the form
-//    <type>[=<flags>]
+//	<type>[=<flags>]
 // where [=<flags>] is only accepted if <type> is perf.
 func ParseConfig(d string) (Config, error) {