[css-text] Make some author conformance statements a bit more in-yer-face.

--HG--
extra : rebase_source : 86420d841da8028326d3027ab10fc27ae0e9e071

Author: fantasai

css-text/Overview.bs

@@ -274,7 +274,7 @@ Languages and Typesetting</h4>
     In CSS, language-specific typographic tailorings
     are only applied when the content language is known (declared).
 
-  <strong>Authors should tag their content accurately for the best typographic behavior.</strong>
+  <strong class="advisement">Authors should tag their content accurately for the best typographic behavior.</strong>
 
 <h2 id="transforming">
   Transforming Text</h2>
@@ -1458,7 +1458,9 @@ Canonical order: N/A
     specifies the inline alignment of all lines of inline content in the block container,
     except for last lines overridden by a non-''text-align-last/auto'' value of 'text-align-last'.
     See 'text-align' for a full description of values.
-    Authors should use the 'text-align' shorthand instead.
+
+    <p class="advisement">
+    Authors should use the 'text-align' shorthand instead of this property.
 
   <h3 id="text-align-last-property">
     Last Line Alignment: the 'text-align-last' property</h3>
@@ -1653,12 +1655,13 @@ Canonical order: N/A
           </div>
     </dl>
 
-    <p>The exact justification algorithm is UA-dependent;
-      however, CSS provides some general guidelines.
-
-    <p>Since optimal justification is language-sensitive,
+    <p class="advisement">
+      Since optimal justification is language-sensitive,
       authors should correctly language-tag their content for the best results.
 
+    <p>The exact justification algorithm is UA-dependent;
+      however, CSS provides some general guidelines below.
+
 <h4 id="expanding-text">
 Expanding and Compressing Text</h4>