diff --git a/contract/models/abstract_contract_line.py b/contract/models/abstract_contract_line.py
index 813eebb1d6a..916cb9a8c86 100644
--- a/contract/models/abstract_contract_line.py
+++ b/contract/models/abstract_contract_line.py
@@ -36,7 +36,7 @@ class ContractAbstractContractLine(models.AbstractModel):
         "able to introduce a manual price",
     )
     # Just to have a currency_id here - will get overwriten in contract.line model with the related currency from the contract
-    currency_id = fields.Many2one('res.currency')
+    currency_id = fields.Many2one("res.currency")
     specific_price = fields.Monetary()
     price_unit = fields.Monetary(
         string="Unit Price",
diff --git a/contract/models/contract.py b/contract/models/contract.py
index 14ea9f5baea..ecaeee56be1 100644
--- a/contract/models/contract.py
+++ b/contract/models/contract.py
@@ -428,7 +428,9 @@ def _prepare_invoice(self, date_invoice, journal=None):
                     "company": self.company_id.name or "",
                 }
             )
-        invoice_type = "in_invoice" if self.contract_type == "purchase" else "out_invoice"
+        invoice_type = (
+            "in_invoice" if self.contract_type == "purchase" else "out_invoice"
+        )
         vals = {
             "move_type": invoice_type,
             "company_id": self.company_id.id,
@@ -438,21 +440,26 @@ def _prepare_invoice(self, date_invoice, journal=None):
             "invoice_date": date_invoice,
             "journal_id": journal.id,
             "invoice_origin": self.name,
-            "invoice_line_ids": [
-            ],
+            "invoice_line_ids": [],
         }
         if self.payment_term_id:
-            vals.update({
-                'invoice_payment_term_id': self.payment_term_id.id,
-            })
+            vals.update(
+                {
+                    "invoice_payment_term_id": self.payment_term_id.id,
+                }
+            )
         if self.fiscal_position_id:
-            vals.update({
-                'fiscal_position_id': self.fiscal_position_id.id,
-            })
+            vals.update(
+                {
+                    "fiscal_position_id": self.fiscal_position_id.id,
+                }
+            )
         if invoice_type == "out_invoice" and self.user_id:
-            vals.update({
-                'invoice_user_id': self.user_id.id,
-            })
+            vals.update(
+                {
+                    "invoice_user_id": self.user_id.id,
+                }
+            )
         return vals
 
     def action_contract_send(self):
diff --git a/contract/models/contract_line.py b/contract/models/contract_line.py
index 00d3c25dddd..7a2108070f4 100644
--- a/contract/models/contract_line.py
+++ b/contract/models/contract_line.py
@@ -32,7 +32,7 @@ class ContractLine(models.Model):
         auto_join=True,
         ondelete="cascade",
     )
-    currency_id = fields.Many2one(related='contract_id.currency_id')
+    currency_id = fields.Many2one(related="contract_id.currency_id")
     analytic_account_id = fields.Many2one(
         string="Analytic account",
         comodel_name="account.analytic.account",
diff --git a/contract/views/abstract_contract_line.xml b/contract/views/abstract_contract_line.xml
index 9a8eaa883c9..e1562f3e4fe 100644
--- a/contract/views/abstract_contract_line.xml
+++ b/contract/views/abstract_contract_line.xml
@@ -14,32 +14,70 @@
                     <field name="specific_price" invisible="1" />
                     <field name="currency_id" invisible="1" />
                     <field colspan="1" name="product_uom_category_id" invisible="1" />
-                    <label for="product_id" attrs="{'invisible': [('display_type', '!=', False)]}"/>
-                    <field colspan="1" name="product_id" attrs="{'required': [('display_type', '=', 'product')],'invisible': [('display_type', '!=', False)]}" nolabel="1"/>
-                    <group col="6" attrs="{'invisible': [('display_type', '!=', False)]}">
+                    <label
+                        for="product_id"
+                        attrs="{'invisible': [('display_type', '!=', False)]}"
+                    />
+                    <field
+                        colspan="1"
+                        name="product_id"
+                        attrs="{'required': [('display_type', '=', 'product')],'invisible': [('display_type', '!=', False)]}"
+                        nolabel="1"
+                    />
+                    <group
+                        col="6"
+                        attrs="{'invisible': [('display_type', '!=', False)]}"
+                    >
                         <group colspan="1">
-                            <label for="automatic_price" colspan="2"/>
-                            <field colspan="2" name="automatic_price" nolabel="1"/>
+                            <label for="automatic_price" colspan="2" />
+                            <field colspan="2" name="automatic_price" nolabel="1" />
                         </group>
                         <group colspan="1">
-                            <label for="price_unit" colspan="2"/>
-                            <field colspan="2" name="price_unit" attrs="{'readonly': [('automatic_price', '=', True)]}" nolabel="1"/>
+                            <label for="price_unit" colspan="2" />
+                            <field
+                                colspan="2"
+                                name="price_unit"
+                                attrs="{'readonly': [('automatic_price', '=', True)]}"
+                                nolabel="1"
+                            />
                         </group>
                         <group colspan="1">
-                            <label for="quantity" colspan="2"/>
-                            <field colspan="2" name="quantity" class="oe_inline" nolabel="1"/>
+                            <label for="quantity" colspan="2" />
+                            <field
+                                colspan="2"
+                                name="quantity"
+                                class="oe_inline"
+                                nolabel="1"
+                            />
                         </group>
                         <group colspan="1">
-                            <label for="uom_id" colspan="2"/>
-                            <field colspan="2" name="uom_id" class="oe_inline" groups="uom.group_uom" attrs="{'required': [('display_type', '=', False)]}" nolabel="1"/>
+                            <label for="uom_id" colspan="2" />
+                            <field
+                                colspan="2"
+                                name="uom_id"
+                                class="oe_inline"
+                                groups="uom.group_uom"
+                                attrs="{'required': [('display_type', '=', False)]}"
+                                nolabel="1"
+                            />
                         </group>
                         <group colspan="1">
-                            <label for="discount" colspan="2"/>
-                            <field colspan="2" name="discount" groups="base.group_no_one" nolabel="1"/>
+                            <label for="discount" colspan="2" />
+                            <field
+                                colspan="2"
+                                name="discount"
+                                groups="base.group_no_one"
+                                nolabel="1"
+                            />
                         </group>
                         <group colspan="1">
-                            <label for="price_subtotal" colspan="2"/>
-                            <field colspan="2" name="price_subtotal" readonly="1" nolabel="1"/>
+                            <label for="price_subtotal" colspan="2" />
+                            <field
+                                colspan="2"
+                                name="price_subtotal"
+                                readonly="1"
+                                nolabel="1"
+                            />
                         </group>
                     </group>
                     <label
diff --git a/contract/views/contract_line.xml b/contract/views/contract_line.xml
index f153868bb0d..7ac002e39ec 100644
--- a/contract/views/contract_line.xml
+++ b/contract/views/contract_line.xml
@@ -14,8 +14,8 @@
                 <group>
                     <field name="create_invoice_visibility" invisible="1" />
                     <field name="is_stop_plan_successor_allowed" invisible="1" />
-                    <field name="is_stop_allowed" invisible="1"/>
-                    <field name="is_cancel_allowed" invisible="1"/>
+                    <field name="is_stop_allowed" invisible="1" />
+                    <field name="is_cancel_allowed" invisible="1" />
                     <field name="date_start" required="1" />
                     <field name="next_period_date_start" />
                     <field name="recurring_next_date" />
diff --git a/contract/views/contract_template.xml b/contract/views/contract_template.xml
index 78d8b1805a5..3af8e564e18 100644
--- a/contract/views/contract_template.xml
+++ b/contract/views/contract_template.xml
@@ -68,7 +68,8 @@
                     string="Legend (for the markers inside invoice lines description)"
                 >
                     <div colspan="2">
-                        <p> <strong>#START#</strong>: Start date of the invoiced period</p>
+                        <p> <strong
+                            >#START#</strong>: Start date of the invoiced period</p>
                         <p> <strong>#END#</strong>: End date of the invoiced period</p>
                     </div>
                 </group>