Merge branch 'pregmod-master' into 'pregmod-master'

Add eslint rule to warn about the comma operator.

See merge request pregmodfan/fc-pregmod!6883

.eslintrc.json

@@ -87,6 +87,7 @@
 				"allowSingleLine": true
 			}
 		],
+		"no-sequences": "warn",
 		"jsdoc/check-alignment": 1,
 		"jsdoc/check-examples": 0, // interferes with SugarCube examples
 		"jsdoc/check-indentation": 0,