typo fix in instructions of fitline.py sample

diff --git a/samples/python2/fitline.py b/samples/python2/fitline.py
index 82b45b0..08b94d7 100755 (executable)
--- a/samples/python2/fitline.py
+++ b/samples/python2/fitline.py
@@ -17,7 +17,7 @@ in case of ~50% of outliers.
 
 Keys
 ----
-SPACE - generaty random points
+SPACE - generate random points
 f     - change distance function
 ESC   - exit
 '''