title: Windows 10 Ubuntu WSL fails to display grep output filenames
body: <p>I am using </p>
  
  <pre><code>grep -rnl "./" -e "search_string"
  </code></pre>
  
  <p>to search a folder's file contents for a "search_string" but it doesn't display filenames. The "-H" option (force filename in output) doesn't change the output. The "-l" option (return only filenames in output) prints several blank lines proportional to the number of files that contain the "search_string" (I have a vague idea how many files contain it) i.e. grep appears to be returning the filenames but the WSL is failing to print them. </p>