title: Pytesseract doesn't recognize decimal points
body: <p>I'm trying to read the text in this image that contains also decimal points and decimal numbers
  <a href="https://i.stack.imgur.com/s9edQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/s9edQ.png" alt="enter image description here" /></a></p>
  <p>in this way:</p>
  <pre><code>img = cv2.imread(path_to_image)
  print(pytesseract.image_to_string(img))
  </code></pre>
  <p>and what I get is:</p>
  <pre><code>73-82
  Primo: 50 —
  </code></pre>
  <p>I've tried to specify also the italian language but the result is pretty similar:</p>
  <pre><code>73-82 _
  Primo: 50
  </code></pre>
  <p>Searching through other questions on stackoverflow I found that the reading of the decimal numbers can be improved by using a whitelist, in this case <code>tessedit_char_whitelist='0123456789.'</code>, but I want to read also the words in the image. Any idea on how to improve the reading of decimal numbers?</p>