Improve description of the new field in README

README.md

@@ -48,16 +48,19 @@ settings:
   label_mapping:
     enhancement: Story
 
-  # (Optional) JIRA issue's summary customization
-  # Allow to define the JIRA issue's summary and eventually format it with the values
-  # of the GH issue variable.
+  # (Optional) JIRA issue's summary
+  # This field can be used to customize the JIRA issue's summary (title)
+  # The value of the field will be an input to the python [`format()`](https://www.w3schools.com/python/ref_string_format.asp) method
+  # to generate the JIRA summary.
+  # The GH issue variable will be captured in the `format` method to allow users to customize
+  # the title with the values of the GH issue.
   # See GH issue definition : https://docs.github.com/en/rest/issues/issues?apiVersion=2022-11-28
   #
   # Examples:
-  # to use fixed title "github issue": "github issue"
-  # to use GH issue title: "{issue.title}"
-  # to add prefix "[GitHub]" : "[GitHub] {issue.title}"
-  # to add user in the title (between square brackets): "[{issue.user.login}] {issue.title}"
+  # to use fixed title "github issue": `"github issue"`
+  # to use GH issue title: `"{issue.title}"`
+  # to add prefix "[GitHub]" : `"[GitHub] {issue.title}"`
+  # to add user in the title (between square brackets): `"[{issue.user.login}] {issue.title}"`
   summary: "{issue.title}"
 ```