[CSS22] [CSS21] <'border-width'> non-existent value type mentioned in section 1.4.2 of CSS 2.1 specification

There is an error in section 1.4.2 of Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification
 
 http://www.w3.org/TR/CSS2/about.html#property-defs
 
 and also in Cascading Style Sheets Level 2 Revision 2 (CSS 2.2) Specification
 
 https://drafts.csswg.org/css2/about.html#property-defs
 
 4. non-terminals that do not share the same name as a property. In this case, the non-terminal name appears between "<" and ">", as in <border-width>. Notice the distinction between <border-width> and <'border-width'>; the latter is defined in terms of the former. The definition of a non-terminal is located near its first appearance in the specification. In the electronic version of the document, each instance of this type of value links to the corresponding value definition.
 
 There is no such value type as <'border-width'>, so it should be replaced by 'border-width', which is a CSS property name, so the above paragraph would read as follows:
 
 
 4. non-terminals that do not share the same name as a property. In this case, the non-terminal name appears between "<" and ">", as in <border-width>. Notice the distinction between <border-width> and 'border-width'; the latter is defined in terms of the former. The definition of a non-terminal is located near its first appearance in the specification. In the electronic version of the document, each instance of this type of value links to the corresponding value definition.