Update MD009/no-trailing-spaces with code_blocks parameter to allow reporting/fixing trailing spaces in indented/fenced code blocks (fixes #1181).

lib/md009.mjs

@@ -13,14 +13,18 @@ export default {
   "function": function MD009(params, onError) {
     let brSpaces = params.config.br_spaces;
     brSpaces = Number((brSpaces === undefined) ? 2 : brSpaces);
+    const codeBlocks = params.config.code_blocks;
+    const includeCode = (codeBlocks === undefined) ? false : !!codeBlocks;
     const listItemEmptyLines = !!params.config.list_item_empty_lines;
     const strict = !!params.config.strict;
     const codeBlockLineNumbers = new Set();
-    for (const codeBlock of filterByTypesCached([ "codeFenced" ])) {
-      addRangeToSet(codeBlockLineNumbers, codeBlock.startLine + 1, codeBlock.endLine - 1);
-    }
-    for (const codeBlock of filterByTypesCached([ "codeIndented" ])) {
-      addRangeToSet(codeBlockLineNumbers, codeBlock.startLine, codeBlock.endLine);
+    if (!includeCode) {
+      for (const codeBlock of filterByTypesCached([ "codeFenced" ])) {
+        addRangeToSet(codeBlockLineNumbers, codeBlock.startLine + 1, codeBlock.endLine - 1);
+      }
+      for (const codeBlock of filterByTypesCached([ "codeIndented" ])) {
+        addRangeToSet(codeBlockLineNumbers, codeBlock.startLine, codeBlock.endLine);
+      }
     }
     const listItemLineNumbers = new Set();
     if (listItemEmptyLines) {