Call transformPasted when pasting into a code block

FIX: Make sure `transformPasted` is properly called when pasting into a code
block.

Author: marijnh

src/clipboard.ts

@@ -44,10 +44,14 @@ export function parseFromClipboard(view: EditorView, text: string, html: string
   let inCode = $context.parent.type.spec.code
   let dom: HTMLElement | undefined, slice: Slice | undefined
   if (!html && !text) return null
-  let asText: boolean = !!text && (plainText || inCode || !html)
+  let asText = !!text && (plainText || inCode || !html)
   if (asText) {
     view.someProp("transformPastedText", f => { text = f(text, inCode || plainText, view) })
-    if (inCode) return text ? new Slice(Fragment.from(view.state.schema.text(text.replace(/\r\n?/g, "\n"))), 0, 0) : Slice.empty
+    if (inCode) {
+      slice = new Slice(Fragment.from(view.state.schema.text(text.replace(/\r\n?/g, "\n"))), 0, 0)
+      view.someProp("transformPasted", f => { slice = f(slice!, view, true) })
+      return slice
+    }
     let parsed = view.someProp("clipboardTextParser", f => f(text, $context, plainText, view))
     if (parsed) {
       slice = parsed