internal/fetch: remove trailing tab from module path

It seems unintentional. Spotted while reviewing CL 520735.

Change-Id: Ia364d8d7e2b81a8f2e5b95d88014b3a630c9bcd8
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/521116
TryBot-Result: Gopher Robot <gobot@golang.org>
kokoro-CI: kokoro <noreply+kokoro@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>

internal/fetch/known_alternatives.go

@@ -26,7 +26,7 @@ var knownAlternatives = map[string]string{
 	"gopkg.in/azure/azure-sdk-for-go":                  "github.com/Azure/azure-sdk-for-go",
 	"github.com/masslessparticle/azure-sdk-for-go":     "github.com/Azure/azure-sdk-for-go",
 	"github.com/aliyun/alibaba-cloud-sdk-go":           "github.com/Azure/azure-sdk-for-go",
-	"github.com/johnstairs/azure-sdk-for-go	":          "github.com/Azure/azure-sdk-for-go",
+	"github.com/johnstairs/azure-sdk-for-go":           "github.com/Azure/azure-sdk-for-go",
 	"github.com/shopify/sarama":                        "github.com/Shopify/sarama",
 }