html2canvas remove multiple spaces and Line Break

I'm using html2canvas to render html contents to image. But it supports only single blank space between word and also all text displayed only in One.

Example 1

if text is  `Word1      Word2` it become to `word1 word2`

Example 2

This is First line 
This is Second Line 

Image: 

THis is First line This is Second Line

I looked in to the html2canvas Code and I believe below these two functions are responsible for drawing the text and spaces. Help me how can i achieve my target.

  function renderText(el, textNode, stack) {
    var ctx = stack.ctx,
    color = getCSS(el, "color"),
    textDecoration = getCSS(el, "textDecoration"),
    textAlign = getCSS(el, "textAlign"),
    metrics,
    textList,
    state = {
      node: textNode,
      textOffset: 0
    };

    if (Util.trimText(textNode.nodeValue).length > 0) {
      textNode.nodeValue = textTransform(textNode.nodeValue, getCSS(el, "textTransform"));
      textAlign = textAlign.replace(["-webkit-auto"],["auto"]);

      textList = (!options.letterRendering && /^(left|right|justify|auto)$/.test(textAlign) && noLetterSpacing(getCSS(el, "letterSpacing"))) ?
      textNode.nodeValue.split(/(\b| )/)
      : textNode.nodeValue.split("");

      metrics = setTextVariables(ctx, el, textDecoration, color);

      if (options.chinese) {
        textList.forEach(function(word, index) {
          if (/.*[\u4E00-\u9FA5].*$/.test(word)) {
            word = word.split("");
            word.unshift(index, 1);
            textList.splice.apply(textList, word);
          }
        });
      }

      textList.forEach(function(text, index) {
        var bounds = getTextBounds(state, text, textDecoration, (index < textList.length - 1), stack.transform.matrix);
        if (bounds) {
          drawText(text, bounds.left, bounds.bottom, ctx);
          renderTextDecoration(ctx, textDecoration, bounds, metrics, color);
        }
      });
    }
  }

      function drawText(currentText, x, y, ctx){
        if (currentText !== null && Util.trimText(currentText).length > 0) {
          ctx.fillText(currentText, x, y);
          numDraws+=1;
        }
      }