title: Create patch of modified part only
body: <p>I have a file with 1500 lines, more or less and I modified only one line and used <code>diff -u original.txt modified.txt &gt; original.patch</code> and instead of creating a patch file with the modified part only, it has not only the original, but the modified entirely on that file. Is it possible to have ONLY the modified part on the patch?</p>