Fix YAML syntax in documentation strings

Author: buxell

plugins/modules/medialive_sdi_source.py

@@ -37,7 +37,7 @@
   mode:
     description:
       - Applies only if the type is 'QUAD'
-      - Specify the mode for handling the quad-link signal: 'QUADRANT' or 'INTERLEAVE'
+      - Specify the mode for handling the quad-link signal, 'QUADRANT' or 'INTERLEAVE'
     type: str
     required: false
     choices: ['QUADRANT', 'INTERLEAVE']