style: format code with Prettier and RuboCop

This commit fixes the style issues introduced in 1efc9e3 according to the output
from Prettier and RuboCop.

Details: #1157

_tasks/format/format-md.mjs

@@ -3,8 +3,6 @@ import yarnpkgShell from '@yarnpkg/shell';
 let code = 0;
 const scripts = ['npx prettier --write "**/*.md"'];
 
-
-
 scripts.forEach(async (v, i) => {
   code = await yarnpkgShell.execute(scripts[i]);
   process.exitCode = code > 0 ? code : 0;