title: Why is git ignoring my changed file?
body: <p>I make an arbitrary change to a file within my git working directory. </p>
  
  <p><code>git status</code> does not recognized that the file has changed.</p>
  
  <p><code>git add /path/to/file</code> has no effect. </p>
  
  <p><code>git add -f /path/to/file</code> has no effect. </p>
  
  <p><code>git status /path/to/file</code> shows the file as in the 'changes to be committed' bucket. </p>
  
  <p>I removed my .gitignore file, just to be sure. No change to any of the above behaviors.</p>
  
  <p>I have done <code>git reset --hard</code>, re-made my change. No change to any of the above behaviors.</p>
  
  <p>What could be going on here?</p>