Convert "internal" levels to new level format

levels/internals/tree-nested

@@ -1,3 +1,25 @@
+[description]
+
+Trees can also point to other trees! This way, they can describe nested directory structures.
+
+When you add a file inside of a directory to the index, and then call `git write-tree`, it will create a nested tree for the directory, and attach the blob to it.
+
+To solve this level, build a little stick figure, as shown on the left - a tree that points to two blobs, as well to a tree that points to two blobs.
+
+[setup]
+
+[setup goal]
+
+echo "I'm the left arm" > arm1
+echo "I'm the right arm" > arm2
+mkdir hip
+echo "I'm the left leg" > hip/leg1
+echo "I'm the right leg" > hip/leg2
+git add .
+git write-tree
+
+[win]
+
 TREES=$(git cat-file --batch-check='%(objectname) %(objecttype)' --batch-all-objects | grep tree | cut -f1 -d" ")
 
 for OUTER_TREE in $TREES; do

levels/internals/tree-nested/description

@@ -1,5 +0,0 @@
-Trees can also point to other trees! This way, they can describe nested directory structures.
-
-When you add a file inside of a directory to the index, and then call `git write-tree`, it will create a nested tree for the directory, and attach the blob to it.
-
-To solve this level, build a little stick figure, as shown on the left - a tree that points to two blobs, as well to a tree that points to two blobs.

levels/internals/tree-nested/goal

@@ -1,7 +0,0 @@
-echo "I'm the left arm" > arm1
-echo "I'm the right arm" > arm2
-mkdir hip
-echo "I'm the left leg" > hip/leg1
-echo "I'm the right leg" > hip/leg2
-git add .
-git write-tree