Implement "DO NOT EDIT" comment convention

Update all generated files with `go generate ./...`.

See golang/go#13560 for details.

pkg/moq/template.go

@@ -4,7 +4,7 @@ package moq
 var moqImports = []string{}
 
 // moqTemplate is the template for mocked code.
-var moqTemplate = `// Code generated by moq; DO NOT EDIT
+var moqTemplate = `// Code generated by moq; DO NOT EDIT.
 // github.com/matryer/moq
 
 package {{.PackageName}}

pkg/moq/testpackages/dotimport/service_moq_test.go

@@ -1,4 +1,4 @@
-// Code generated by moq; DO NOT EDIT
+// Code generated by moq; DO NOT EDIT.
 // github.com/matryer/moq
 
 package dotimport_test