Update readme

README.md

@@ -83,6 +83,20 @@ Removes any space before and after parenthesis in filter and function calls.
 
 Removes any space before and after opening and closing of arrays and hashes.
 
+### Macro spacing
+
+Do not put any spaces before and after ``=`` in macro argument declarations.
+
+Put exactly one space after the ``:`` sign in macro argument declarations.
+
+### Naming
+
+Use snake case for all variable names.
+
+Use snake case for all argument names.
+
+Use snake case for all named arguments.
+
 ## Custom configuration
 
 By default, the twig-cs-fixer standard is enabled with the twig coding standard rules and some extra rules.