[css-fonts-4] "font" shorthand must be updated to incorporate new variation font values

#515

Author: litherum

css-fonts-4/Overview.bs

@@ -867,7 +867,7 @@ at least as dark as its predecessor. Only values between 1 - 999 are valid, and
 
 	<pre class="propdef">
 	Name: font
-	Value: [ [ 'font-style' || 'font-variant-css21' || 'font-weight' || 'font-stretch' ]? 'font-size' [ / 'line-height' ]? 'font-family' ] | caption | icon | menu | message-box | small-caption | status-bar
+	Value: [ [ 'font-style' || 'font-variant-css21' || 'font-weight' || 'font-stretch-css3' ]? 'font-size' [ / 'line-height' ]? 'font-family' ] | caption | icon | menu | message-box | small-caption | status-bar
 	Initial: see individual properties
 	Applies to: all elements
 	Inherited: yes
@@ -884,6 +884,11 @@ at least as dark as its predecessor. Only values between 1 - 999 are valid, and
 
 	<pre class="prod"><dfn id="font-variant-css21-values"><var>&lt;font-variant-css21&gt;</var></dfn> = [normal | small-caps]</pre>
 
+	Values for the 'font-stretch' property may also be included but only those supported in
+	CSS Fonts level 3, none of the 'font-stretch' values added in this specification can be used in the 'font' shorthand:
+
+	<pre class="prod"><dfn id="font-stretch-css3-values"><var>&lt;font-stretch-css3&gt;</var></dfn> = [normal | ultra-condensed | extra-condensed | condensed | semi-condensed | semi-expanded | expanded | extra-expanded | ultra-expanded]</pre>
+
 	The syntax of this property is based on a traditional typographical
 	shorthand notation to set multiple properties related to fonts.
 
@@ -905,6 +910,7 @@ at least as dark as its predecessor. Only values between 1 - 999 are valid, and
 	p { font: bold italic large Palatino, serif }
 	p { font: normal small-caps 120%/120% fantasy }
 	p { font: condensed oblique 12pt &quot;Helvetica Neue&quot;, serif; }
+	p { font: condensed oblique 25deg 753 12pt &quot;Helvetica Neue&quot;, serif; }
 	</pre>
 
 	In the second rule, the font size percentage value ("80%") refers
@@ -923,9 +929,11 @@ at least as dark as its predecessor. Only values between 1 - 999 are valid, and
 	('fantasy'). It follows that the keyword 'normal' applies to the two
 	remaining properties: 'font-style' and 'font-weight'.
 
-
 	The sixth rule sets the 'font-style', 'font-stretch', 'font-size', and 'font-family', the other font
 	properties being set to their initial values.
+
+	The seventh rule sets 'font-style' to "oblique 25deg", 'font-weight' to "753", and 'font-stretch' to "condensed".
+	Note that the "25deg" in this rule must be immediately following the "oblique" keyword.
 	</div>
 
 	Since the 'font-stretch' property was not defined in CSS 2.1, when using 'font-stretch'