Convert "internal" levels to new level format

levels/internals/index-update

@@ -0,0 +1,33 @@
+[description]
+
+Instead of removing an entry from the index and adding one with the same name, you can also directly update that entry!
+
+Put the content you want in a file with a matching name, and then run
+
+    git update-index <file>
+
+This will create a new blob, and update the hash of the entry to that blob.
+
+Update an entry in the index!
+
+[setup]
+
+echo "file 1" > file1
+echo "file 2" > file2
+echo "file 3" > file3
+git add .
+
+[setup goal]
+
+echo "file 1" > file1
+echo "file 2" > file2
+echo "file 3" > file3
+git add .
+
+echo "new content" > file1
+git update-index file1
+
+[win]
+
+# This is not really a good test for the winning condition...
+test "$(git ls-files -s | git hash-object --stdin)" != "10c4b28623e7e44e09f5a596450a50ab7ac31fbe" -a "$(git ls-files | wc -l)" -eq 3

levels/internals/index-update/description

@@ -1,9 +0,0 @@
-Instead of removing an entry from the index and adding one with the same name, you can also directly update that entry!
-
-Put the content you want in a file with a matching name, and then run
-
-    git update-index <file>
-
-This will create a new blob, and update the hash of the entry to that blob.
-
-Update an entry in the index!

levels/internals/index-update/goal

@@ -1,2 +0,0 @@
-echo "new content" > file1
-git update-index file1

levels/internals/index-update/start

@@ -1,4 +0,0 @@
-echo "file 1" > file1
-echo "file 2" > file2
-echo "file 3" > file3
-git add .

levels/internals/index-update/win

@@ -1,2 +0,0 @@
-# This is not really a good test for the winning condition...
-test "$(git ls-files -s | git hash-object --stdin)" != "10c4b28623e7e44e09f5a596450a50ab7ac31fbe" -a "$(git ls-files | wc -l)" -eq 3