[FIX] *: RST cleanup

RST cleanup to comply with the RST guidelines. This is required so we
can use "make test", as there are currently hundreds of errors. For now,
it is unusable because of the oldest code in this repo.

closes odoo/documentation#3581

Signed-off-by: Castillo Jonathan (jcs) <jcs@odoo.com>

content/applications/finance/accounting/receivables/customer_invoices/credit_notes.rst

@@ -1,6 +1,7 @@
 ========================
 Credit notes and refunds
 ========================
+
 A **credit note**, or **credit memo**, is a document issued
 to a customer that notifies them that they have been credited
 a certain amount.
@@ -18,6 +19,7 @@ There are several reasons that can lead to a credit note, such as:
 
 Issue a Credit Note
 ===================
+
 You can create a credit note from scratch by going to
 :menuselection:`Accounting --> Customers --> Credit Notes`,
 and by clicking on *Create*. Filling the Credit Note’s form
@@ -42,6 +44,7 @@ You can choose between three options:
 
 Partial Refund
 --------------
+
 Odoo creates a draft credit note already prefilled with all the
 necessary information from the original invoice.
 
@@ -53,6 +56,7 @@ want to modify any detail on the credit note.
 
 Full Refund
 -----------
+
 Odoo creates a credit note, automatically validates it, and
 reconciles the original invoice with it.
 
@@ -64,6 +68,7 @@ a validated invoice.
 
 Full refund and new draft invoice
 ---------------------------------
+
 Odoo creates a credit note, automatically validates it, reconciles
 the original invoice with it, and open a new draft invoice
 prefilled with the same details from the original invoice.
@@ -72,6 +77,7 @@ This is the option to choose to modify the content of a validated invoice.
 
 Record a Vendor Refund
 ======================
+
 **Vendor Refunds** are recorded the same way you would do with invoices’ credit notes:
 
 You can either create a credit note from scratch by going
@@ -81,6 +87,7 @@ and clicking on *Add Credit Note*.
 
 Journal Entries
 ===============
+
 Issuing a credit note from an invoice creates a **reverse entry**
 that zeroes out the journal items generated by the original invoice.