fix(check-indentation): ensure decorators in fenced code blocks do …

…not terminate ignoring of indentation in code blocks; fixes #789

Prevent decorators from being interpreted as tags which may force end code block masking

README.md

@@ -1932,6 +1932,20 @@ function quux () {
 * ```
 */
 // "jsdoc/check-indentation": ["error"|"warn", {"excludeTags":[]}]
+
+/**
+ * @example
+ * ```
+ * @MyDecorator({
+ *   myOptions: 42
+ * })
+ * export class MyClass {}
+ * ```
+ */
+function MyDecorator(options: { myOptions: number }) {
+  return (Base: Function) => {};
+}
+// "jsdoc/check-indentation": ["error"|"warn", {"excludeTags":["example","MyDecorator"]}]
 ````
 
 

src/rules/checkIndentation.js

@@ -9,7 +9,7 @@ const maskExcludedContent = (str, excludeTags) => {
 };
 
 const maskCodeBlocks = (str) => {
-  const regContent = /([ \t]+\*)[ \t]```[^\n]*?([\w|\W]*?\n)(?=[ \t]*\*(?:[ \t]*(?:```|@)|\/))/gu;
+  const regContent = /([ \t]+\*)[ \t]```[^\n]*?([\w|\W]*?\n)(?=[ \t]*\*(?:[ \t]*(?:```|@\w+\s)|\/))/gu;
 
   return str.replace(regContent, (_match, margin, code) => {
     return new Array(code.match(/\n/gu).length + 1).join(margin + '\n');

test/rules/assertions/checkIndentation.js

@@ -289,5 +289,27 @@ export default {
         excludeTags: [],
       }],
     },
+    {
+      code: `
+      /**
+       * @example
+       * \`\`\`
+       * @MyDecorator({
+       *   myOptions: 42
+       * })
+       * export class MyClass {}
+       * \`\`\`
+       */
+      function MyDecorator(options: { myOptions: number }) {
+        return (Base: Function) => {};
+      }
+      `,
+      options: [
+        {
+          excludeTags: ['example', 'MyDecorator'],
+        },
+      ],
+      parser: require.resolve('@typescript-eslint/parser'),
+    },
   ],
 };