fix whitespace

adaptive/learner/data_saver.py

@@ -17,7 +17,7 @@ class DataSaver:
     -------
     Imagine we have a function that returns a dictionary
     of the form: ``{'y': y, 'err_est': err_est}``.
-    
+
     >>> from operator import itemgetter
     >>> _learner = Learner1D(f, bounds=(-1.0, 1.0))
     >>> learner = DataSaver(_learner, arg_picker=itemgetter('y'))

check_whitespace

@@ -6,4 +6,3 @@
     tail -n1 $f | read -r _ || echo $f: no newline at end of file
     tail -n1 $f | grep -q '^$' && echo $f: empty line at end of file
 done | grep . >&2
-