title: Reading git diff output
body: <p>I am just starting to learn how to use git and have run git diff on the files below - Im a bit confused about how you read the output - </p>
  
  <p>From what I understand so far the below is saying there is a difference between the working directory and the index in relation to file01 and then file02.  Could someboby explain in english how you read this part of the output --> <code>@@ -1,4 +1 @@</code></p>
  
  <p>Thanks for your help </p>
  
  <pre><code>diff --git a/file01 b/file01
  index cc17fa4..d0a432b 100644
  --- a/file01
  +++ b/file01
  @@ -1,4 +1 @@
  -datafiles
  -file01
  -file02
  -file03
  +This is a change
  diff --git a/file02 b/file02
  index e69de29..552c22e 100644
  --- a/file02
  +++ b/file02
  @@ -0,0 +1 @@
  +and this is another change
  </code></pre>