go/analysis/analysistest: fix word usage

Change-Id: Iec304e44375b0740b8bc594cfe6ce35637284555
Reviewed-on: https://go-review.googlesource.com/c/tools/+/175939
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/go/analysis/analysistest/analysistest_test.go b/go/analysis/analysistest/analysistest_test.go
index bc07051..a3ab461 100644
--- a/go/analysis/analysistest/analysistest_test.go
+++ b/go/analysis/analysistest/analysistest_test.go
@@ -14,7 +14,7 @@
 
 func init() {
 	// This test currently requires GOPATH mode.
-	// Explicitly disabling module mode should suffix, but
+	// Explicitly disabling module mode should suffice, but
 	// we'll also turn off GOPROXY just for good measure.
 	if err := os.Setenv("GO111MODULE", "off"); err != nil {
 		log.Fatal(err)