Update anchor-position-1.vim

https://www.w3.org/TR/2025/WD-css-anchor-position-1-20251007/

Author: hail2u

after/syntax/css/anchor-position-1.vim

@@ -1,4 +1,4 @@
 syn keyword cssFontProp contained anchor-name anchor-scope position-area position-anchor position-try position-try-fallbacks position-try-order position-visibility
-syn keyword cssFontAttr contained span-left span-right span-x-start span-x-end x-self-start x-self-end span-x-self-start span-x-self-end span-all span-top span-bottom span-y-start span-y-end y-self-start y-self-end span-y-self-start span-y-self-end block-start block-end span-block-start span-block-end self-block-start self-block-end span-self-block-start span-self-block-end inline-start inline-end span-inline-start span-inline-end self-inline-start self-inline-end span-self-inline-start span-self-inline-end span-start span-end self-start self-end span-self-start span-self-end anchor-center most-width most-height most-block-size most-inline-size flip-block flip-inline flip-start
+syn keyword cssFontAttr contained span-left span-right span-x-start span-x-end self-x-start self-x-end span-self-x-start span-self-x-end span-all span-top span-bottom span-y-start span-y-end self-y-start self-y-end span-self-y-start span-self-y-end block-start block-end span-block-start span-block-end self-block-start self-block-end span-self-block-start span-self-block-end inline-start inline-end span-inline-start span-inline-end self-inline-start self-inline-end span-self-inline-start span-self-inline-end span-start span-end self-start self-end span-self-start span-self-end anchor-center most-width most-height most-block-size most-inline-size flip-block flip-inline flip-start
 syn region cssFunction contained matchgroup=cssFunctionName start="\<anchor\(-size\)\=\s*(" end=")" oneline keepend
 syn match cssFontDescriptor "@position-try\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

test/test.css

@@ -23,19 +23,19 @@
   display: span-right;
   display: span-x-start;
   display: span-x-end;
-  display: x-self-start;
-  display: x-self-end;
-  display: span-x-self-start;
-  display: span-x-self-end;
+  display: self-x-start;
+  display: self-x-end;
+  display: span-self-x-start;
+  display: span-self-x-end;
   display: span-all;
   display: span-top;
   display: span-bottom;
   display: span-y-start;
   display: span-y-end;
-  display: y-self-start;
-  display: y-self-end;
-  display: span-y-self-start;
-  display: span-y-self-end;
+  display: self-y-start;
+  display: self-y-end;
+  display: span-self-y-start;
+  display: span-self-y-end;
   display: span-block-start;
   display: span-block-end;
   display: self-block-start;
@@ -60,6 +60,7 @@
   display: flip-block;
   display: flip-inline;
   display: flip-start;
+  display: dialog;
   display: anchor(--x 50%);
   display: anchor-size(--foo height);
 }