preserve stepcount in chunks (#1358)

* preserve stepcount in chunks
* format

packages/core/pattern.mjs

@@ -2441,9 +2441,14 @@ const _chunk = function (n, func, pat, back = false, fast = false) {
   return pat.when(binary_pat, func);
 };
 
-export const { chunk, slowchunk, slowChunk } = register(['chunk', 'slowchunk', 'slowChunk'], function (n, func, pat) {
+export const { chunk, slowchunk, slowChunk } = register(
-  return _chunk(n, func, pat, false, false);
+  ['chunk', 'slowchunk', 'slowChunk'],
-});
+  function (n, func, pat) {
+    return _chunk(n, func, pat, false, false);
+  },
+  true,
+  true,
+);
 
 /**
  * Like `chunk`, but cycles through the parts in reverse order. Known as chunk' in tidalcycles
@@ -2455,9 +2460,14 @@ export const { chunk, slowchunk, slowChunk } = register(['chunk', 'slowchunk', '
  * "0 1 2 3".chunkBack(4, x=>x.add(7))
  * .scale("A:minor").note()
  */
-export const { chunkBack, chunkback } = register(['chunkBack', 'chunkback'], function (n, func, pat) {
+export const { chunkBack, chunkback } = register(
-  return _chunk(n, func, pat, true);
+  ['chunkBack', 'chunkback'],
-});
+  function (n, func, pat) {
+    return _chunk(n, func, pat, true);
+  },
+  true,
+  true,
+);
 
 /**
  * Like `chunk`, but the cycles of the source pattern aren't repeated
@@ -2471,9 +2481,14 @@ export const { chunkBack, chunkback } = register(['chunkBack', 'chunkback'], fun
  * .fastChunk(4, x => x.color('red')).slow(2)
  * .scale("C2:major").note()
  */
-export const { fastchunk, fastChunk } = register(['fastchunk', 'fastChunk'], function (n, func, pat) {
+export const { fastchunk, fastChunk } = register(
-  return _chunk(n, func, pat, false, true);
+  ['fastchunk', 'fastChunk'],
-});
+  function (n, func, pat) {
+    return _chunk(n, func, pat, false, true);
+  },
+  true,
+  true,
+);
 
 // TODO - redefine elsewhere in terms of mask
 export const bypass = register(