Consider the following snippet:
functionWithAVeryLongParameterList( /* $param1 */ 1, /* $param2 */ 2, ... /* $param10 */ 10 )
Currently, it generates a warning:
xx | WARNING | Comments should start on new line. | | (MediaWiki.WhiteSpace.SpaceBeforeSingleLineComment.NewLineComment)
However, adding clarity to call lists like that is a perfectly good practice and should not be discouraged.