Convert "internal" levels to new level format

levels/internals/puzzle-trees-all-the-way-down

@@ -1,3 +1,19 @@
+[description]
+
+Construct a chain of three trees, which don't point to anything else.
+
+This is hard! The `git mktree` command might be useful.
+
+[setup]
+
+[setup goal]
+
+git mktree
+TREE=$(echo -e "040000 tree 4b825dc642cb6eb9a060e54bf8d69288fbee4904\tdir" | git mktree)
+echo -e "040000 tree $TREE\tdir" | git mktree
+
+[win]
+
 TREES=$(git cat-file --batch-check='%(objectname) %(objecttype)' --batch-all-objects | grep tree | cut -f1 -d" ")
 
 for TREE in $TREES; do

levels/internals/puzzle-trees-all-the-way-down/description

@@ -1,3 +0,0 @@
-Construct a chain of three trees, which don't point to anything else.
-
-This is hard! The `git mktree` command might be useful.

levels/internals/puzzle-trees-all-the-way-down/goal

@@ -1,3 +0,0 @@
-git mktree
-TREE=$(echo -e "040000 tree 4b825dc642cb6eb9a060e54bf8d69288fbee4904\tdir" | git mktree)
-echo -e "040000 tree $TREE\tdir" | git mktree