[FIX] Fix attribute "digits" on "discount" fields.

sale_discount_total/views/account_invoice_view.xml

@@ -8,7 +8,7 @@
             <field name="inherit_id" ref="account.invoice_form"/>
             <field name="arch" type="xml">
                 <xpath expr="//field[@name='discount']" position="attributes">
-                    <attribute name="digits">(16, 2)</attribute>
+                    <attribute name="digits">[16, 2]</attribute>
                 </xpath>
                 <xpath expr="//field[@name='amount_untaxed']" position="after">
                         <field name="amount_discount"/>
@@ -32,7 +32,7 @@
             <field name="inherit_id" ref="account.view_invoice_line_tree"/>
             <field name="arch" type="xml">
                 <xpath expr="//field[@name='discount']" position="attributes">
-                    <attribute name="digits">(16, 2)</attribute>
+                    <attribute name="digits">[16, 2]</attribute>
                 </xpath>
             </field>
         </record>

sale_discount_total/views/sale_view.xml

@@ -15,7 +15,7 @@
                      <attribute name ="states">draft,sent,sale,waiting</attribute>
                 </xpath>
                 <!--<xpath expr="//tree/field[@name='discount']" position="replace">-->
-                    <!--<field name="discount" class="oe_inline" digits="(16, 2)"/> %%-->
+                    <!--<field name="discount" class="oe_inline" digits="[16, 2]"/> %%-->
                 <!--</xpath>-->
                 <xpath expr="//group[@name='sale_total']" position="replace">
                     <group col="4">