title: How to run a shell command with range value as an argument
body: <p>It would be quite useful for transforming images, for example.</p>
  
  <p><code>mogrify -trim -fuzz 40% *.{jpg,png}</code> is great but it's hard to guess the right amount of fuzz.</p>
  
  <p>It would be useful to do something like this <code>convert image.jpg -trim -fuzz [10..100+10]% output.jpg</code> meaning from 10% to 100% with 10% iteration. That would create output.f10.jpg up to output.f100.jpg.</p>
  
  <p>I tried to implement it with custom shell script using some <code>eval</code> and replaces but failed to find a convenient and flexible implementation.</p>