Fix sphinx build warnings

HISTORY.rst

@@ -23,17 +23,18 @@ Changes from API 2018-11-08:
 
 Changes from API 2019-02-19:
 
-- Major changes to Account fields, see https://stripe.com/docs/upgrades#2019-02-19
-    Updated Account fields to match API 2019-02-19:
+- Major changes to Account fields, see https://stripe.com/docs/upgrades#2019-02-19 , updated Account fields to match API 2019-02-19:
 - Added ``Account.business_profile``, ``.business_type``, ``.company``, ``.individual``, ``.requirements``, ``.settings``
 - Deprecated the existing fields, to be removed in 2.2
+
 - Special handling of the icon and logo fields:
+
 	- Renamed ``Account.business_logo`` to ``Account.branding_icon``
-	 (note that in Stripe's API ``Account.business_logo`` was renamed to ``Account.settings.branding_icon``,
-	 and ``Account.business_logo_large`` (which we didn't have a field for) was renamed to ``Account.settings.branding_logo``)
+	  (note that in Stripe's API ``Account.business_logo`` was renamed to ``Account.settings.branding_icon``,
+	  and ``Account.business_logo_large`` (which we didn't have a field for) was renamed to ``Account.settings.branding_logo``)
 	- Added deprecated property for ``Account.business_logo``
 	- Added ``Account.branding_logo`` as a ForeignKey
-    - Populate ``Account.branding_icon`` and ``.branding_logo`` from the new ``Account.settings.branding.icon`` and ``.logo``
+	- Populate ``Account.branding_icon`` and ``.branding_logo`` from the new ``Account.settings.branding.icon`` and ``.logo``
 
 Changes from API 2019-03-14: