Fix lint error

Some weird formatting issue in using comment suggestion

Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>

model/histogram/histogram_test.go

@@ -613,7 +613,7 @@ func TestCustomBucketsHistogramToFloat(t *testing.T) {
 	require.NoError(t, h.Validate())
 	for _, c := range cases {
 		t.Run(c.name, func(t *testing.T) {
- 			hStr := h.String()
+			hStr := h.String()
 			fh := h.ToFloat(c.fh)
 			require.NoError(t, fh.Validate())
 			require.Equal(t, hStr, h.String())