Implement `--diff` to receive a unidiff on STDIN and report errors on modified code only. (Closes #39)

1 files changed, 2 insertions, 0 deletions

diff --git a/README.rst b/README.rst
index 2d47cd5..b212dad 100644
--- a/README.rst
+++ b/README.rst
@@ -115,6 +115,8 @@ Quick help is available on the command line::
     --doctest            run doctest on myself
     --config=path        config file location (default: /home/user/.config/pep8)
     --format=format      set the error format [default|pylint|<custom>]
+    --diff               report only lines changed according to the unified diff
+                         received on STDIN
 
 Feedback
 --------