[Standards] Remove additional comma

Author: alexandre-daubois

.doctor-rst.yaml

@@ -96,3 +96,4 @@ whitelist:
         - '// bin/console'
         - '.. _`a feature to test applications using Mercure`: https://github.com/symfony/panther#creating-isolated-browsers-to-test-apps-using-mercure-or-websocket'
         - '..  End to End Tests (E2E)'
+        - 'The `foo\` option ...'

contributing/code/standards.rst

@@ -181,7 +181,7 @@ Structure
 
 * Exception and error messages must not contain backticks (e.g. 'The \`foo\` option ...'),
   even when referring to a technical element (such as a method or variable name).
-  Double quotes must be used at all time (e.g. 'The "foo" option ...'),;
+  Double quotes must be used at all time (e.g. 'The "foo" option ...');
 
 * Exception and error messages must start with a capital letter and finish with a dot ``.``;