go/analysis: fix typos

Change-Id: I07235ffba66bf0f7ef0e1917c6f711d317c9ae02
Reviewed-on: https://go-review.googlesource.com/c/tools/+/194139
Reviewed-by: Toshihiro Shiino <shiino.toshihiro@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/go/analysis/validate.go b/go/analysis/validate.go
index 6e6cf49..b984ab6 100644
--- a/go/analysis/validate.go
+++ b/go/analysis/validate.go
@@ -10,7 +10,7 @@
 // Checks include:
 // that the name is a valid identifier;
 // that analyzer names are unique;
-// that the Requires graph is acylic;
+// that the Requires graph is acyclic;
 // that analyzer fact types are unique;
 // that each fact type is a pointer.
 func Validate(analyzers []*Analyzer) error {