[css-align] Fix typos and minor links fixups. Closes #3548.

Author: tabatkins

css-align-3/Overview.bs

@@ -117,7 +117,7 @@ Module interactions</h3>
 <h3 id="values">
 Values</h3>
 
-	This specification follows the <a href="https://www.w3.org/TR/CSS21/about.html#property-defs">CSS property definition conventions</a> from [[!CSS2]].
+	This specification follows the <a href="https://www.w3.org/TR/CSS2/about.html#property-defs">CSS property definition conventions</a> from [[!CSS2]].
 	Value types not defined in this specification are defined in CSS Values & Units [[!CSS-VALUES-3]].
 	Other CSS modules may expand the definitions of these value types.
 
@@ -1340,7 +1340,7 @@ Inline-Axis (or Main-Axis) Alignment: the 'justify-self' property</h3>
 			<th>Other Details
 			<td>
 				In terms of CSS2.1 block-level formatting [[!CSS2]],
-				the rules for “over-constrained” computations in <a href="https://www.w3.org/TR/CSS21/visudet.html#blockwidth">section 10.3.3</a>
+				the rules for “over-constrained” computations in <a href="https://www.w3.org/TR/CSS2/visudet.html#blockwidth">section 10.3.3</a>
 				are ignored in favor of alignment as specified here
 				and the used value of the margin properties are therefore not adjusted to correct for the over-constraint.
 
@@ -1397,12 +1397,12 @@ Inline-Axis (or Main-Axis) Alignment: the 'justify-self' property</h3>
 			<th>Other Details
 			<td>
 				In terms of CSS2.1 formatting [[!CSS2]],
-				the rules for “over-constrained” computations in <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">section 10.3.7</a>
+				the rules for “over-constrained” computations in <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-width">section 10.3.7</a>
 				are ignored in favor of alignment as specified here,
 				and the used value of the inset properties are not adjusted to correct for the over-constraint.
 
 				Values other than ''justify-self/stretch'' or ''justify-self/normal''
-				cause <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">non-replaced absolutely-positioned boxes</a>
+				cause <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-width">non-replaced absolutely-positioned boxes</a>
 				to use <a>fit-content sizing</a> for calculating ''width/auto'' sizes
 				in the affected axis.
 
@@ -1411,7 +1411,7 @@ Inline-Axis (or Main-Axis) Alignment: the 'justify-self' property</h3>
 				just as non-replaced ones do.
 
 				Note: If only one inset property is ''top/auto'',
-				the computations in <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">CSS2 section 10.3.7</a>
+				the computations in <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-width">CSS2 section 10.3.7</a>
 				fully determine its size and position,
 				and 'justify-self' has no effect.
 				(If both are ''top/auto'',
@@ -1565,12 +1565,12 @@ Block-Axis (or Cross-Axis) Alignment: the 'align-self' property</h3>
 			<th>Other Details
 			<td>
 				In terms of CSS2.1 formatting [[!CSS2]],
-				the rules for "over-constrained" computations in <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height">section 10.6.4</a>
+				the rules for "over-constrained" computations in <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-height">section 10.6.4</a>
 				are ignored in favor of alignment as specified here
 				and the used value of the inset properties are not adjusted to correct for the over-constraint.
 
 				Values other than ''justify-self/stretch'' or ''justify-self/normal''
-				cause <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height">non-replaced absolutely-positioned boxes</a>
+				cause <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-height">non-replaced absolutely-positioned boxes</a>
 				to use <a>fit-content sizing</a> for calculating ''height/auto'' sizes
 				in the affected axis.
 
@@ -1579,7 +1579,7 @@ Block-Axis (or Cross-Axis) Alignment: the 'align-self' property</h3>
 				just as non-replaced ones do.
 
 				Note: If only one inset property is ''top/auto'',
-				the computations in <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height">CSS2 section 10.6.4</a>
+				the computations in <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-height">CSS2 section 10.6.4</a>
 				fully determine its size and position,
 				and 'align-self' has no effect.
 				(If both are ''top/auto'',
@@ -2291,19 +2291,19 @@ Appendix A: Static Position Terminology</h2>
 		are defined in [[CSS2]] Chapter 10.
 		The <a>static position rectangle</a> is a zero-thickness rectangle spanning between
 		the inline-axis sides of the box’s <a>static-position containing block</a>
-		(see <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">CSS2&sect;10.3.7</a>);
+		(see <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-width">CSS2&sect;10.3.7</a>);
 		and positioned at its <a>block-start</a> <a>static position</a>
-		(see <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height">CSS2&sect;10.6.4).
+		(see <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-height">CSS2&sect;10.6.4</a>).
 
 		<dt>Inline Layout
 		<dd>
-		The <a>static positions</a> of a <a>inline-level box</a>
+		The <a>static positions</a> of an <a>inline-level box</a>
 		are defined in [[CSS2]] Chapter 10.
 		The <a>static position rectangle</a> is a zero-thickness rectangle spanning between
 		the <a>line-over</a>/<a>line-under</a> sides of the <a>line box</a>
 		that would have contained its “hypothetical box”
-		(see <a href="https://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width">CSS2&sect;10.3.7</a>);
-		and positioned at its <a>inline-start</a> <a>static position</a>
+		(see <a href="https://www.w3.org/TR/CSS2/visudet.html#abs-non-replaced-width">CSS2&sect;10.3.7</a>);
+		and positioned at its <a>inline-start</a> <a>static position</a>.
 
 		<dt>Flex Layout
 		<dd>
@@ -2318,7 +2318,7 @@ Appendix A: Static Position Terminology</h2>
 		However, if that <a>grid container</a> also establishes
 		the box’s actual <a>containing block</a>,
 		then the <a>grid area</a> specified by the <a>grid-placement properties</a>
-		instead establishes its <a>static position rectangle</a>.
+		establishes its <a>static position rectangle</a> instead.
 		See the <a href="https://www.w3.org/TR/css-grid-1/#static-position">static position of a grid container child</a> in [[!CSS-GRID-1]].
 	</dl>