remove inaccurate testing documentation

Author: danvk

README.md

@@ -51,14 +51,7 @@ This shows a JavaScript file being diffed. A few things to note:
 * Line deletions and per-character modifications.
 * Long stretches of common lines are elided, but can be shown if desired.
 * Syntax highlighting (via highlight.js)
-* Keyboard shortcuts (j/k) for stepping through fiels in the diff.
-
-Testing
--------
-
-(from an activated virtualenv)
-
-    python test/*.py
+* Keyboard shortcuts (j/k) for stepping through files in the diff.
 
 Development
 -----------