[css-mixins-1] Typo: default return type is type(*)

Author: cdoublev

css-mixins-1/Overview.bs

@@ -213,7 +213,7 @@ the optional [=function parameters=]
 are given by the <<function-parameter>> values
 (defaulting to an empty set),
 and the optional [=custom function/return type=] is given by the <<css-type>> following the <css>returns</css> keyword
-(defaulting to ''*'').
+(defaulting to ''type(*)'').
 
 <div class='example'>
 	If the <<css-type>> of a [=function parameter=] or [=custom function/return type=]