final comment sweep: section separators, signature-only javadocs and history notes removed, stale comments corrected (sign/contents model lookup, inverted entity cubes, item-bounds use, datapack folder search, biome tint argb, water-only overlay faces, beacon first section, mushroom-cow instanceof example, legacy skin arm copy, elytra and pack-detection notes in the scripts, pptest scene descriptions), comments only

tools/update-cem-models.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # Updates the vendored CEM template model set (Ewan Howell / wynem: vanilla Java entity models as JSON). It is
-# only the rest-pose FALLBACK for entity types missing from the vanilla client dump (+ the elytra fallback);
-# mob and block-entity models come from tools/update-vanilla-models.sh.
+# only the rest-pose FALLBACK for entity types missing from the vanilla client dump; mob and block-entity models
+# come from tools/update-vanilla-models.sh.
 #
 # Usage:  tools/update-cem-models.sh           # update if newer
 #         tools/update-cem-models.sh --force   # always overwrite