minor, tweak spacing

turn 8 spaces to tab, add space before Null/Crap
diff --git a/src/hb-aat-map.cc b/src/hb-aat-map.cc
index 2556842..2c38c35 100644
--- a/src/hb-aat-map.cc
+++ b/src/hb-aat-map.cc
@@ -62,7 +62,7 @@
      * small-caps if necessary, so we need to check for that possibility.
      * https://github.com/harfbuzz/harfbuzz/issues/2307 */
     if (mapping->aatFeatureType == HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE &&
-        mapping->selectorToEnable == HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_SMALL_CAPS)
+	mapping->selectorToEnable == HB_AAT_LAYOUT_FEATURE_SELECTOR_LOWER_CASE_SMALL_CAPS)
     {
       feature = &face->table.feat->get_feature (HB_AAT_LAYOUT_FEATURE_TYPE_LETTER_CASE);
       if (!feature->has_data ()) return;
@@ -87,10 +87,10 @@
     unsigned int j = 0;
     for (unsigned int i = 1; i < features.length; i++)
       if (features[i].type != features[j].type ||
-          /* Nonexclusive feature selectors come in even/odd pairs to turn a setting on/off
-           * respectively, so we mask out the low-order bit when checking for "duplicates"
-           * (selectors referring to the same feature setting) here. */
-          (!features[i].is_exclusive && ((features[i].setting & ~1) != (features[j].setting & ~1))))
+	  /* Nonexclusive feature selectors come in even/odd pairs to turn a setting on/off
+	   * respectively, so we mask out the low-order bit when checking for "duplicates"
+	   * (selectors referring to the same feature setting) here. */
+	  (!features[i].is_exclusive && ((features[i].setting & ~1) != (features[j].setting & ~1))))
 	features[++j] = features[i];
     features.shrink (j + 1);
   }