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

test/trailing-spaces-in-code-false.md

@@ -0,0 +1,30 @@
+# Trailing Spaces in Code - False
+
+const a = 10;
+const b = 10; 
+const c = 10;  
+const d = 10;   
+const e = 10;    
+
+{MD009:-5} {MD009:-3} {MD009:-2}
+
+    const a = 10;
+    const b = 10; 
+    const c = 10;  
+    const d = 10;   
+    const e = 10;    
+
+```js
+const a = 10;
+const b = 10; 
+const c = 10;  
+const d = 10;   
+const e = 10;    
+```
+
+<!-- markdownlint-configure-file {
+  "code-block-style": false,
+  "no-trailing-spaces": {
+    "code_blocks": false
+  }
+} -->