[css-align] Rename <item-position> to <self-position>, so both productions reference the properties they're used in.

--HG--
extra : rebase_source : 71475b0447b0f139349cfbb8d59d50a7f7249d63

Author: tabatkins

css-align/Overview.bs

@@ -184,15 +184,15 @@ Positional Alignment: the ''center'', ''start'', ''end'', ''self-start'', ''self
 	The positional alignment keywords specify a position for an <a>alignment subject</a>
 	with respect to its <a>alignment container</a>.
 
-	The <<item-position>> set of values is used by 'justify-self' and 'align-self'
+	The <<self-position>> set of values is used by 'justify-self' and 'align-self'
 	to align the box within its <a>alignment container</a>,
 	and also by 'justify-items' and 'align-items'
 	(to specify default values for 'justify-self' and 'align-self').
 	The <<content-position>> set of values is used by 'justify-content' and 'align-content'
 	to align the box's contents within itself.
 
 	<pre class='prod'>
-		<dfn>&lt;item-position></dfn> = center | start | end | self-start | self-end |
+		<dfn>&lt;self-position></dfn> = center | start | end | self-start | self-end |
 		                   flex-start | flex-end | left | right;
 		<dfn>&lt;content-position></dfn> = center | start | end | flex-start | flex-end | left | right;
 	</pre>
@@ -201,43 +201,43 @@ Positional Alignment: the ''center'', ''start'', ''end'', ''self-start'', ''self
 	Values have the following meanings:
 
 	<dl dfn-type="value">
-		<dt><dfn for="<item-position>, <content-position>">center</dfn>
+		<dt><dfn for="<self-position>, <content-position>">center</dfn>
 		<dd>Centers the <a>alignment subject</a> within its <a>alignment container</a>.
 
-		<dt><dfn for="<item-position>, <content-position>">start</dfn>
+		<dt><dfn for="<self-position>, <content-position>">start</dfn>
 		<dd>Aligns the <a>alignment subject</a> to be flush with the <a>alignment container</a>’s start edge.
 
-		<dt><dfn for="<item-position>, <content-position>">end</dfn>
+		<dt><dfn for="<self-position>, <content-position>">end</dfn>
 		<dd>Aligns the <a>alignment subject</a> to be flush with the <a>alignment container</a>’s end edge.
 
-		<dt><dfn for="<item-position>">self-start</dfn>
+		<dt><dfn for="<self-position>">self-start</dfn>
 		<dd>Aligns the <a>alignment subject</a> to be flush with the edge of the <a>alignment container</a>
 			corresponding to the <a>alignment subject</a>’s start side.
 
-		<dt><dfn for="<item-position>">self-end</dfn>
+		<dt><dfn for="<self-position>">self-end</dfn>
 		<dd>Aligns the <a>alignment subject</a> to be flush with the edge of the <a>alignment container</a>
 			corresponding to the <a>alignment subject</a>’s end side.
 
-		<dt><dfn for="<item-position>, <content-position>">flex-start</dfn>
+		<dt><dfn for="<self-position>, <content-position>">flex-start</dfn>
 		<dd><strong>Only used in flex layout.</strong> [[!CSS3-FLEXBOX]]
 			Aligns the <a>alignment subject</a> to be flush with the edge of the <a>alignment container</a>
 			corresponding to the <a>flex container</a>’s main-start or cross-start side, as appropriate.
 			When used in layout modes other than Flexbox,
 			this value computes to ''start''.
 
-		<dt><dfn for="<item-position>, <content-position>">flex-end</dfn>
+		<dt><dfn for="<self-position>, <content-position>">flex-end</dfn>
 		<dd><strong>Only used in flex layout.</strong>
 			Aligns the <a>alignment subject</a> to be flush with the edge of the <a>alignment container</a>
 			corresponding to the <a>flex container</a>’s main-end or cross-end side, as appropriate.
 			When used in layout modes other than Flexbox,
 			this value computes to ''end''.
 
-		<dt><dfn for="<item-position>, <content-position>">left</dfn>
+		<dt><dfn for="<self-position>, <content-position>">left</dfn>
 		<dd>Aligns the <a>alignment subject</a> to be flush with the <a>alignment container</a>’s <a href="http://www.w3.org/TR/css3-writing-modes/#line-left">line-left</a> edge.
 			If the property's axis is not parallel with the inline axis,
 			this value computes to ''start''.
 
-		<dt><dfn for="<item-position>, <content-position>">right</dfn>
+		<dt><dfn for="<self-position>, <content-position>">right</dfn>
 		<dd>Aligns the <a>alignment subject</a> to be flush with the <a>alignment container</a>’s <a href="http://www.w3.org/TR/css3-writing-modes/#line-right">line-right</a> edge.
 			If the property's axis is not parallel with the inline axis,
 			this value computes to ''start''.
@@ -366,7 +366,7 @@ Distributed Alignment: the ''<content-distribution>/stretch'', ''space-between''
 			Unless otherwise specified,
 			this value falls back to ''flex-start''.
 			<span class='note'>(For layout modes other than flex layout, ''flex-start'' is identical to ''start''.)</span>
-			
+
 			Issue: Should this value allow a fallback alignment on 'align-self' and 'justify-self',
 			like it does on 'align-content' and 'justify-content'?
 	</dl>
@@ -582,7 +582,7 @@ Inline/Main-Axis Alignment: the 'justify-self' property</h3>
 
 	<pre class="propdef">
 	Name: justify-self
-	Value: auto | stretch | <<baseline-position>> | [ <<overflow-position>>? && <<item-position>> ]
+	Value: auto | stretch | <<baseline-position>> | [ <<overflow-position>>? && <<self-position>> ]
 	Initial: auto
 	Applies to: block-level boxes, absolutely-positioned boxes, and grid items
 	Inherited: no
@@ -683,7 +683,7 @@ Block/Cross-Axis Alignment: the 'align-self' property</h3>
 
 	<pre class="propdef">
 	Name: align-self
-	Value: auto | stretch | <<baseline-position>> | [ <<overflow-position>>? && <<item-position>> ]
+	Value: auto | stretch | <<baseline-position>> | [ <<overflow-position>>? && <<self-position>> ]
 	Initial: auto
 	Applies to: flex items, grid items, and absolutely-positioned boxes
 	Inherited: no
@@ -811,7 +811,7 @@ Inline/Main-Axis Alignment: the 'justify-items' property</h3>
 
 	<pre class="propdef">
 	Name: justify-items
-	Value: auto | stretch | <<baseline-position>> | [ <<item-position>> && <<overflow-position>>? ] | [ legacy && [ ''<content-position>/left'' | ''<content-position>/right'' | ''<content-position>/center'' ] ]
+	Value: auto | stretch | <<baseline-position>> | [ <<self-position>> && <<overflow-position>>? ] | [ legacy && [ ''<content-position>/left'' | ''<content-position>/right'' | ''<content-position>/center'' ] ]
 	Initial: auto
 	Applies to: block containers, flex containers, and grid containers
 	Inherited: no
@@ -855,7 +855,7 @@ Block/Cross-Axis Alignment: the 'align-items' property</h3>
 
 	<pre class="propdef">
 	Name: align-items
-	Value: auto | stretch | <<baseline-position>> | [ <<item-position>> && <<overflow-position>>? ]
+	Value: auto | stretch | <<baseline-position>> | [ <<self-position>> && <<overflow-position>>? ]
 	Initial: auto
 	Applies to: block-level elements
 	Inherited: no