Enable whitespace linter & fix findings (#12273)

* Enable whitespace linter & fix findings

* Fix new finding

* fix new violation

---------

Co-authored-by: Radosław Kapka <rkapka@wp.pl>
Co-authored-by: Preston Van Loon <preston@prysmaticlabs.com>
Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>

testing/spectest/shared/common/forkchoice/builder.go

@@ -147,5 +147,4 @@ func (bb *Builder) Check(t testing.TB, c *Check) {
 		got := fmt.Sprintf("%#x", bb.service.ProposerBoost())
 		require.DeepEqual(t, want, got)
 	}
-
 }

testing/spectest/shared/common/forkchoice/runner.go

@@ -131,7 +131,6 @@ func runTest(t *testing.T, config string, fork int, basePath string) {
 					}
 					if step.PayloadStatus != nil {
 						require.NoError(t, builder.SetPayloadStatus(step.PayloadStatus))
-
 					}
 					if step.PowBlock != nil {
 						powBlockFile, err := util.BazelFileBytes(testsFolderPath, folder.Name(), fmt.Sprint(*step.PowBlock, ".ssz_snappy"))