Some parts of the standard are already covered (ref #750)

src/Standards/PSR12/ruleset.xml

@@ -265,19 +265,13 @@
     <!-- 7. Closures -->
 
     <!-- Closures MUST be declared with a space after the function keyword, and a space before and after the use keyword. -->
-
     <!-- The opening brace MUST go on the same line, and the closing brace MUST go on the next line following the body. -->
-
     <!-- There MUST NOT be a space after the opening parenthesis of the argument list or variable list, and there MUST NOT be a space before the closing parenthesis of the argument list or variable list. -->
-
     <!-- In the argument list and variable list, there MUST NOT be a space before each comma, and there MUST be one space after each comma. -->
-
     <!-- Closure arguments with default values MUST go at the end of the argument list. -->
-
     <!-- Argument lists and variable lists MAY be split across multiple lines, where each subsequent line is indented once. When doing so, the first item in the list MUST be on the next line, and there MUST be only one argument or variable per line. -->
-
     <!-- When the ending list (whether of arguments or variables) is split across multiple lines, the closing parenthesis and opening brace MUST be placed together on their own line with one space between them. -->
-
+    <!-- checked by Squiz.Functions.MultiLineFunctionDeclaration -->
 
     <!-- 8. Anonymous Classes -->