text: 'use strict';
  
  let m = 1;
  console.assert(m === 1, 'Test 1: m');
  {
    const l = 3;
    m = 2;
    console.assert(m === 2, 'Test 2: m');
    console.assert(l === 3, 'Test 3: l');
  }
  m = 4;
  console.assert(m === 4, 'Test 4: m');
  