[css-anchor-position-1] Remove text about anchor-center causing the element to shift to stay in view; we want that for other alignments, too.

Author: tabatkins

css-anchor-position-1/Overview.bs

@@ -106,11 +106,11 @@ Determining The Anchor {#determining}
 <!-- Big Text: a-name
 
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@@ -271,12 +271,12 @@ or nothing (a missing specifier).
 <!-- Big Text: default
 
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 <h3 id=anchor-default>
@@ -349,8 +349,8 @@ to explicitly refer to edges of an [=anchor element=].
 
 <!-- Big Text: inset-area
 
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@@ -564,13 +564,13 @@ will resolve the contradiction.
 
 <!-- Big Text: anchor()
 
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 The ''anchor()'' Function {#anchor-pos}
@@ -749,12 +749,12 @@ as if by an additional ''translate()'' transform.
 
 <!-- Big Text: a-center
 
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@@ -781,11 +781,6 @@ if the positioned element has a [=default anchor element=],
 then it is aligned so as to center itself
 over the [=default anchor element=]
 in the appropriate axis.
-If this alignment would cause it to overflow its [=inset-modified containing block=]
-in the appropriate axis,
-it instead is aligned flush with the side that it would have overflowed;
-if it would overflow both sides,
-it's instead aligned as for ''justify-self/start''.
 
 Additionally,
 if both [=inset properties=] in the appropriate axis are ''top/auto'',
@@ -805,20 +800,15 @@ or does not have a [=default anchor element=],
 this value behaves as ''<self-position>/center''
 and has no additional effect on how [=inset properties=] resolve.
 
-Issue: Do we want to hook the "try to stay in the IMCB" behavior to safe vs unsafe?
-Right now it'll only trigger fallback if it overflows both sides;
-it might be useful to be able to trigger fallback
-as soon as it can't center itself.
-
 
 <!-- Big Text: scroll
 
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@@ -915,13 +905,13 @@ it resolves to ''0px''.
 
 <!-- Big Text: a-size()
 
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 Anchor-based Sizing {#sizing}
@@ -994,11 +984,11 @@ it resolves to ''0px''.
 <!-- Big Text: fallback
 
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@@ -1192,15 +1182,15 @@ this property determines which [=position option=] to use.
 </dl>
 
 
-<!-- Big Text: @pos-try 
+<!-- Big Text: @pos-try
 
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 The ''@position-try'' Rule {#fallback-rule}