https://pdf.yt/d/BeioWriXAn-DkFcO

When searching the above pdf for the phrase 'acute' the second hit hightlights the nearby word ' especi'.  Almost certainly this is the same issue that I raised in #5667 

However, when examining the generated html you can see that the highlighted text is incorrect - it contains the text ' especi' and not the search term 'acute' - it is not a positioning issue.  (see screenshot).

I am using Chrome 39, windows 8.1 x64 and pdf.js 1.0.1093

![image](https://cloud.githubusercontent.com/assets/10129039/5864096/f2d665a4-a276-11e4-91fa-af6eb36f0cde.png)

if (query.length === 0) {
      
      return;
    }
    if (!caseSensitive) {
      pageContent = pageContent.toLowerCase();
      query = query.toLowerCase();
    }
    if (phraseSearch) {
      this._calculatePhraseMatch(query, pageIndex, pageContent, entireWord);
    } else {
      this._calculateWordMatch(query, pageIndex, pageContent, entireWord);
    }
    
    
    if (this._state.highlightAll) {
      this._updatePage(pageIndex);
    }
    if (this._resumePageIdx === pageIndex) {
      this._resumePageIdx = null;
      this._nextPageMatch();
    }
    
    const pageMatchesCount = this._pageMatches[pageIndex].length;
    if (pageMatchesCount > 0) {
      this._matchesCountTotal += pageMatchesCount;
      this._updateUIResultsCount();
    }
  }
  _extractText() {