internal: fix misspelling and staticcheck warnings

Change-Id: Ia9369c3762f61a0fefd9d44d97ac6eb95132f79c
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/258217
Run-TryBot: Robert Findley <rfindley@google.com>
Trust: Robert Findley <rfindley@google.com>
Reviewed-by: Julie Qiu <julie@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
diff --git a/internal/fetch/fetch.go b/internal/fetch/fetch.go
index 4b79b15..3b9c011 100644
--- a/internal/fetch/fetch.go
+++ b/internal/fetch/fetch.go
@@ -70,7 +70,7 @@
 		Description: "Fetch request count by result status",
 		TagKeys:     []tag.Key{dcensus.KeyStatus},
 	}
-	// FetchPackageCount counts how many packages were sucessfully fetched.
+	// FetchPackageCount counts how many packages were successfully fetched.
 	FetchPackageCount = &view.View{
 		Name:        "go-discovery/worker/fetch-package-count",
 		Measure:     fetchedPackages,
diff --git a/internal/fetch/sourcefiles_test.go b/internal/fetch/sourcefiles_test.go
index 38c9a80..ab4d996 100644
--- a/internal/fetch/sourcefiles_test.go
+++ b/internal/fetch/sourcefiles_test.go
@@ -12,23 +12,6 @@
 	"testing"
 )
 
-// astFilesForDir reads the Go files in dir and returns
-// them along with a FileSet.
-func astFilesForDir(dir string) (*token.FileSet, []*ast.File, error) {
-	fset := token.NewFileSet()
-	pkgs, err := parser.ParseDir(fset, dir, nil, parser.ParseComments)
-	if err != nil {
-		return nil, nil, err
-	}
-	var files []*ast.File
-	for _, p := range pkgs {
-		for _, f := range p.Files {
-			files = append(files, f)
-		}
-	}
-	return fset, files, nil
-}
-
 func TestEncodeDecodeASTFiles(t *testing.T) {
 	// Verify that we can encode and decode the Go files in this directory.
 	fset := token.NewFileSet()
diff --git a/internal/frontend/server_test.go b/internal/frontend/server_test.go
index df2ed7c..b25bb96 100644
--- a/internal/frontend/server_test.go
+++ b/internal/frontend/server_test.go
@@ -396,7 +396,7 @@
 		},
 		{
 			name:           "search large offset",
-			urlPath:        fmt.Sprintf("/search?q=github.com&page=1002"),
+			urlPath:        "/search?q=github.com&page=1002",
 			wantStatusCode: http.StatusBadRequest,
 		},
 		{