bad markHTML

file.txt

<a>
    <a>
<a>
  <a>
    <a>
      <a>
     <a>
    <a>
  <a>
<a>
```  
<a>
    <a>
````
  <a>
<a>
```
<a>
```

markHTML.js

var backquote, indented, markLine;

indented = function(line) {
  return line.slice(0, 4) === '    ';
};

backquote = function(line) {
  return line.slice(0, 3) === '```';
};

markLine = function(line) {
  if (line[0] === '>') {
    return mark_line(line.slice(1));
  } else {
    return line.replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/\s/g, '&nbsp;');
  }
};

exports.html = function(str) {
  var isQuote, isText, list;
  isText = true;
  isQuote = false;
  list = [];
  str.split('\n').forEach(function(line) {
    var ret;
    if (indented(line)){isText = false }else{isText = true};
    if (backquote(line)) isQuote = !isQuote;
    ret = isText && (!isQuote) ? markLine(line) : line;
    return list.push(ret);
  });
  return list.join('\n');
};

test.coffee

html = require('./markHTML').html
fs = require 'fs'

raw = fs.readFileSync 'file.txt', 'utf8'
out = html raw

list_a = raw.split '\n'
list_b = out.split '\n'
len = list_b.length

show = console.log

[0...len].forEach (i) ->
  show i, list_a[i]
  show i, list_b[i]
  show '\n'

test.log

➤➤ coffee t.coffee 
0 ''
0 ''


1 '<a>'
1 '&lt;a&gt;'


2 '    <a>'
2 '    <a>'


3 '<a>'
3 '&lt;a&gt;'


4 '  <a>'
4 '&nbsp;&nbsp;&lt;a&gt;'


5 '    <a>'
5 '    <a>'


6 '      <a>'
6 '      <a>'


7 '     <a>'
7 '     <a>'


8 '    <a>'
8 '    <a>'


9 '  <a>'
9 '&nbsp;&nbsp;&lt;a&gt;'


10 '<a>'
10 '&lt;a&gt;'


11 '```  '
11 '```  '


12 '<a>'
12 '<a>'


13 '    <a>'
13 '    <a>'


14 '````'
14 '````'


15 '  <a>'
15 '&nbsp;&nbsp;&lt;a&gt;'


16 '<a>'
16 '&lt;a&gt;'


17 '```'
17 '```'


18 '<a>'
18 '<a>'


19 '```'
19 '```'