another typo

docs/julia_examples.rst

@@ -67,7 +67,7 @@ and our line is defined as
 .. math::
   r(x, y) = f(x) - y.
 
-One reasonable way to measure the how different line is from the data is to
+One reasonable way to measure how different the line is from the data is to
 sum the squares of the residuals between each point in the data and the line:
 
 .. math::