build: enable doctest-annotation-spacing lint rule

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Planeshifter

etc/eslint/rules/stdlib.js

@@ -97,6 +97,35 @@ rules[ 'stdlib/capitalized-comments' ] = [ 'warn', {
 */
 rules[ 'stdlib/doctest' ] = 'off';
 
+/**
+* Enforce spacing in return annotations in single-line comments.
+*
+* @name doctest-annotation-spacing
+* @memberof rules
+* @type {string}
+* @default 'error'
+*
+* @example
+* // Bad...
+* var v = 3.14;
+* // returns             3.14
+*
+* console.log( 'beep' );
+* //=> 'beep'
+*
+* var x = true;
+* //  returns true
+*
+* @example
+* // Good...
+* var v = 3.14;
+* // returns 3.14
+*
+* console.log( 'beep' );
+* // => 'beep'
+*/
+rules[ 'stdlib/doctest-annotation-spacing' ] = 'error';
+
 /**
 * Enforce marker style conventions for return annotations.
 *