diff --git a/.gitignore b/.gitignore
index 5f2c3f600..3434c580e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -248,6 +248,7 @@ docs/_build
 docs/generated
 docs/api
 docs/whatsnew/latest_changelog.txt
+docs/sg_execution_times.rst
 examples/**/*.asdf
 examples/**/*.csv
 figure_test_images*
diff --git a/ndcube/ndcube.py b/ndcube/ndcube.py
index 1ce16333a..93a1866fa 100644
--- a/ndcube/ndcube.py
+++ b/ndcube/ndcube.py
@@ -218,11 +218,10 @@ def crop(self,
 
         Examples
         --------
-        An example of cropping a region of interest on the Sun from a 3-D image-time cube:
+        >>> # An example of cropping a region of interest on the Sun from a 3-D image-time cube
         >>> point1 = [SkyCoord(-50*u.deg, -40*u.deg, frame=frames.HeliographicStonyhurst), None]  # doctest: +SKIP
         >>> point2 = [SkyCoord(0*u.deg, -6*u.deg, frame=frames.HeliographicStonyhurst), None]  # doctest: +SKIP
         >>> NDCube.crop(point1, point2) # doctest: +SKIP
-
         """
 
     @abc.abstractmethod
@@ -268,7 +267,7 @@ def crop_by_values(self,
 
         Examples
         --------
-        An example of cropping a region of interest on the Sun from a 3-D image-time cube:
+        >>> # An example of cropping a region of interest on the Sun from a 3-D image-time cube
         >>> NDCube.crop_by_values((-600, -600, 0), (0, 0, 0), units=(u.arcsec, u.arcsec, u.s)) # doctest: +SKIP
         """