Fix formatting and indentation in regression tutorial

examples/regression/4-tutorials/plot_main-tutorial-regression.py

@@ -1,11 +1,10 @@
-"""
+r"""
 ===============================
 Tutorial for tabular regression
 ===============================
 
 In this tutorial, we compare the prediction intervals estimated by MAPIE on a
-simple, one-dimensional, ground truth function
-:math:`f(x) = x \times \sin(x)`.
+simple, one-dimensional, ground truth function :math:`f(x) = x \times \sin(x)`.
 Throughout this tutorial, we will answer the following questions:
 - How well do the MAPIE strategies capture the aleatoric uncertainty
   existing in the data?
@@ -21,6 +20,7 @@
 use the CV-minmax strategies.**
 """
 
+
 import os
 import warnings