[css-writing-modes][editorial] Add hyphenated lt for adjective form linking

Author: fantasai

css-writing-modes-3/Overview.bs

@@ -1521,8 +1521,8 @@ Abstract Box Terminology</h2>
   </dl>
 
   <p export>The <dfn>physical dimensions</dfn> are <dfn>width</dfn> and <dfn>height</dfn>,
-    which correspond to measurements along the <dfn lt="x-axis|horizontal axis">x-axis</dfn>
-    (<dfn>horizontal dimension</dfn>) and <dfn lt="y-axis|vertical axis">y-axis</dfn> (<dfn>vertical dimension</dfn>),
+    which correspond to measurements along the <dfn lt="x-axis|horizontal axis|horizontal-axis">x-axis</dfn>
+    (<dfn>horizontal dimension</dfn>) and <dfn lt="y-axis|vertical axis|vertical-axis">y-axis</dfn> (<dfn>vertical dimension</dfn>),
     respectively. <a href="#abstract-axes">Abstract dimensions</a>
     are identical in both flow-relative and line-relative terms, so there
     is only one set of these terms.

css-writing-modes-4/Overview.bs

@@ -1595,8 +1595,8 @@ Abstract Box Terminology</h2>
   </dl>
 
   <p export>The <dfn>physical dimensions</dfn> are <dfn>width</dfn> and <dfn>height</dfn>,
-    which correspond to measurements along the <dfn lt="x-axis|horizontal axis">x-axis</dfn>
-    (<dfn>horizontal dimension</dfn>) and <dfn lt="y-axis|vertical axis">y-axis</dfn> (<dfn>vertical dimension</dfn>),
+    which correspond to measurements along the <dfn lt="x-axis|horizontal axis|horizontal-axis">x-axis</dfn>
+    (<dfn>horizontal dimension</dfn>) and <dfn lt="y-axis|vertical axis|vertical-axis">y-axis</dfn> (<dfn>vertical dimension</dfn>),
     respectively. <a href="#abstract-axes">Abstract dimensions</a>
     are identical in both flow-relative and line-relative terms, so there
     is only one set of these terms.