title: Remove this string "\r" inside a column from a dataframe
body: <p>I have one dataframe with more than 40k rows. Before I deleted all the empty emails and incorrect emails using a regex, but yer there are some emails that has this <code>\r</code> string and the end of the domain and also exists in some of it one space.</p>
  <pre><code>                             email                   name  last_name
  50052       juancitopues@gmail.com  \r        JUAN ANDRES     DAVILA
  50053       marcosjhon27@gmail.com\r     MARCOS JHONNATAN   ESQUIVES
  </code></pre>
  <p>I tried using replace but I was not capable of remove that strings <code>\r</code></p>
  <pre><code>df_final['email'] = df_final['email'].str.replace('\r', '')
  df_final['email'] = df_final['email'].str.replace(' \r', '')
  </code></pre>
  <p>Any idea I will appreciate guys, thanks so much.</p>