[css-fonts-4] Clean up font-synthesis section

Author: svgeesus

css-fonts-4/Overview.bs

@@ -1317,30 +1317,36 @@ Shorthand font property: the 'font' property</h3>
 <h3 id="font-synthesis-prop">
 Controlling synthetic faces: the 'font-synthesis' property</h3>
 
-<pre class="propdef">
-Name: font-synthesis
-Value: none | [ weight || style || small-caps ]
-Initial: weight style small-caps
-Applies to: all elements
-Inherited: yes
-Percentages: N/A
-Computed value: as specified
-Media: visual
-Animatable: no
-</pre>
+	<pre class="propdef">
+	Name: font-synthesis
+	Value: none | [ weight || style || small-caps ]
+	Initial: weight style small-caps
+	Applies to: all elements
+	Inherited: yes
+	Percentages: N/A
+	Computed value: as specified
+	Media: visual
+	Animatable: no
+	</pre>
 
-This property controls whether user agents are allowed to synthesize bold or oblique font
-faces when a font family lacks bold or italic faces.  If ''weight'' is not specified, user agents
-must not synthesize bold faces. If ''style'' is not specified, user agents must not synthesize
-italic faces. If ''small-caps'' is not specified, user agents must not synthesize small-caps faces
-nor all-small-caps faces.
-A value of ''font-synthesis/none'' disallows all synthetic faces.
+	This property controls whether user agents are allowed
+	to synthesize bold, oblique  or small-cap font faces
+	when a font family lacks bold, italic  or small-cap faces.
+	The initial value allows all types of synthesis.
+	If ''weight'' is not specified,
+	user agents must <em>not</em> synthesize bold faces.
+	If ''style'' is not specified,
+	user agents must <em>not</em> synthesize italic faces.
+	If ''small-caps'' is not specified,
+	user agents must <em>not</em> synthesize small-caps faces
+	<em>nor</em> all-small-caps faces.
+	A value of ''font-synthesis/none'' disallows all synthetic faces.
 
-<div class="example">
-	The style rule below disables the use of synthetically obliqued Arabic:
+	<div class="example">
+		The style rule below disables the use of synthetically obliqued Arabic:
 
-	<pre>*:lang(ar) { font-synthesis: none; }</pre>
-</div>
+		<pre>*:lang(ar) { font-synthesis: none; }</pre>
+	</div>
 
 <h2 id="font-rendering-controls">
 Font Rendering Controls</h2>