const DIAGRAM_1_A = 
  '+---------+-------------+\n' +
  '| Classes | Metaclasses |\n' +
  '+---------+-------------|\n' +
  '| MyClass > MyMetaClass |\n' +
  '|         |     v       |\n' +
  '|  object ---> type <+  |\n' +
  '|         |    ^ +---+  |\n' +
  '|   str -------+        |\n' +
  '+---------+-------------+\n';

const DIAGRAM_1_B =
  '┏━━━━━━━━━┯━━━━━━━━━━━━━┓\n' +
  '┃ Classes │ Metaclasses ┃\n' +
  '┠─────────┼─────────────┨\n' +
  '┃ MyClass → MyMetaClass ┃\n' +
  '┃         │     ↓       ┃\n' +
  '┃  object ───→ type ←╮  ┃\n' +
  '┃         │    ↑ ╰───╯  ┃\n' +
  '┃   str ───────╯        ┃\n' +
  '┗━━━━━━━━━┷━━━━━━━━━━━━━┛\n';

const DIAGRAM_2_A =
  '+---------+-------------+\n' +
  '| Classes | Metaclasses |\n' +
  '+---------+-------------|\n' +
  '| MyClass | MyMetaClass |\n' +
  '|    v    |     v       |\n' +
  '|  object <--- type     |\n' +
  '|    ^    |             |\n' +
  '|   str   |             |\n' +
  '+---------+-------------+\n';

const DIAGRAM_2_B =
  '┏━━━━━━━━━┯━━━━━━━━━━━━━┓\n' +
  '┃ Classes │ Metaclasses ┃\n' +
  '┠─────────┼─────────────┨\n' +
  '┃ MyClass │ MyMetaClass ┃\n' +
  '┃    ↓    │     ↓       ┃\n' +
  '┃  object ←─── type     ┃\n' +
  '┃    ↑    │             ┃\n' +
  '┃   str   │             ┃\n' +
  '┗━━━━━━━━━┷━━━━━━━━━━━━━┛\n';


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if (!isFontAvailable('Menlo')) {
    $(`code:contains(${DIAGRAM_1_B})`).html(DIAGRAM_1_A);
    $(`code:contains(${DIAGRAM_2_B})`).html(DIAGRAM_2_A);
    var htmlString = $('code:contains(ᴺᴱᵂ)').html().replace(/ᴺᴱᵂ/g, '');
    $('code:contains(ᴺᴱᵂ)').html(htmlString);
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