Fix style issues brought up during code review.

Signed-off-by: Jimmy Cuadra <jimmy@jimmycuadra.com>

changelogs/client_server/newsfragments/2132.clarification

@@ -1 +1 @@
-Clarify the distinction between *m.key.verification.start* and its *m.sas.v1* variant.
+Clarify the distinction between ``m`.key.verification.start` and its `m`.`sas.v1` variant.

event-schemas/schema/m.key.verification.start

@@ -3,7 +3,9 @@ allOf:
   - $ref: core-event-schema/event.yaml
 
 description: |-
-  Begins a key verification process. Typically sent as a `to-device`_ event. The ``method`` field determines the type of verification. The fields in the event will differ depending on the ``method``. This definition includes fields that are in common among all variants.
+  Begins a key verification process. Typically sent as a `to-device`_ event. The ``method``
+  field determines the type of verification. The fields in the event will differ depending
+  on the ``method``. This definition includes fields that are in common among all variants.
 properties:
   content:
     properties:

scripts/templating/matrix_templates/units.py

@@ -910,7 +910,6 @@ class MatrixUnits(Units):
             if methods:
                 schema["type_with_msgtype"] = schema["type"] + " (" + methods[0] + ")"
 
-
         # Assign state key info if it has some
         if schema["typeof"] == "State Event":
             skey_desc = Units.prop(