[css-mixins-1][editorial] It's 'prelude'.

Author: tabatkins

css-mixins-1/Overview.bs

@@ -230,19 +230,20 @@ then the [=default value=] must [=CSS/parse=] successfully
 according to that [=parameter type=]'s syntax.
 Otherwise, the ''@function'' rule is invalid.
 
-<h4 id=function-preamble>
-The Function Preamble</h4>
+<h4 id=function-prelude>
+The Function Prelude</h4>
 
 The <<function-token>> production
 must start with two dashes (U+002D HYPHEN-MINUS),
 similar to <<dashed-ident>>,
 or else the definition is invalid.
 
-The name of the resulting [=custom function=] is given by the name of the <<function-token>>,
-the optional [=function parameters=]
+The name of the resulting [=custom function=] is given by the name of the <<function-token>>.
+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
+and the optional [=custom function/return type=]
+is given by the <<css-type>> following the <css>returns</css> keyword
 (defaulting to ''type(*)'').
 
 <div class='example'>
@@ -968,16 +969,16 @@ Otherwise, the ''@mixin'' rule is invalid.
 A ''@mixin'' rule cannot be a [=nested group rule=];
 it is invalid within the body of a [=style rule=].
 
-<h4 id=mixin-preamble>
-The Mixin Preamble</h4>
+<h4 id=mixin-prelude>
+The Mixin Prelude</h4>
 
 The <<function-token>> production
 must start with two dashes (U+002D HYPHEN-MINUS),
 similar to <<dashed-ident>>,
 or else the definition is invalid.
 
-The name of the resulting [=mixin=] is given by the name of the <<function-token>>,
-the optional [=mixin parameters=]
+The name of the resulting [=mixin=] is given by the name of the <<function-token>>.
+The optional [=mixin parameters=]
 are given by the <<function-parameter>> values
 (defaulting to an empty set).