title: grep for x20-x7E regex hex range not working in Windows10 MINGW64 bash
body: <p>My file test.csv</p>
  
  <pre><code>Col1,Col2,Col3,Col4
  1,AAA,1,
  2,BBB,0,
  3,CCCÆ,,ttt
  4,DDD,1,
  5,EEE,0,
  </code></pre>
  
  <p>Expected output:</p>
  
  <pre><code>3,CCCÆ,,ttt
  </code></pre>
  
  <p>Tried:</p>
  
  <pre><code>grep -a "[^\x20-\x7e]+" test.csv
  grep -a '[^\x20-\x7e]+' test.csv
  grep "[^\x20-\x7e]+" test.csv
  grep '[^\x20-\x7e]+' test.csv
  </code></pre>
  
  <p>also tried the flags -P and -E but all do not return me the result I want.
  In Powershell, I did</p>
  
  <pre><code>Select-String -Pattern '[^\x20-\x7E]+' test.csv
  </code></pre>
  
  <p>and it returned me the expected result.</p>
  
  <p>Could someone point me in the right direction for MINGW64 bash <code>grep (GNU grep) 3.1</code> on Windows10? 
  It is installed via git download for windows here: <a href="https://git-scm.com/download/win" rel="nofollow noreferrer">https://git-scm.com/download/win</a></p>