[css-text-3] Add example of variations in Thai line-breaking to line-break: strict|normal|loose.

Author: fantasai

css-text-3/Overview.bs

@@ -924,7 +924,7 @@ Line Breaking Details</h3>
         <dd>
       <pre>这·是·一·些·汉·字,·and·some·Latin,<!--
         -->·&#x0648;·&#x06A9;&#x0645;&#x06CC;·&#x0646;&#x0648;&#x0634;&#x062A;&#x0646;·&#x0639;&#x0631;&#x0628;&#x06CC;,·<!--
-        -->และ·ตัวอย่าง·การ·เขียน·ภาษา·ไทย.</pre>
+        -->และ·ตัวอย่าง·การเขียน·ภาษาไทย.</pre>
         <dt>''word-break: break-all''</dt>
         <dd>
       <pre>这·是·一·些·汉·字,·a·n·d·s·o·m·e·L·a·t·i·n,<!--
@@ -934,7 +934,7 @@ Line Breaking Details</h3>
         <dd>
       <pre>这是一些汉字,·and·some·Latin,<!--
         -->·&#x0648;·&#x06A9;&#x0645;&#x06CC;·&#x0646;&#x0648;&#x0634;&#x062A;&#x0646;·&#x0639;&#x0631;&#x0628;&#x06CC;,·<!--
-        -->และ·ตัวอย่าง·การ·เขียน·ภาษา·ไทย.</pre>
+        -->และ·ตัวอย่าง·การเขียน·ภาษาไทย.</pre>
       </dl>
     </div>
 
@@ -1045,11 +1045,24 @@ Line Breaking Details</h3>
         </ul>
     </ul>
 
-    <p class="note">In the recommended list above, no distinction is made among the levels of
-      strictness in non-CJK text: only CJK codepoints are affected, unless
-      the text is marked as Chinese or Japanese, in which case some additional
-      common codepoints are affected. However a future level of CSS may add
-      behaviors affecting non-CJK text.
+    <p class="note">In the requirements listed above,
+      no distinction is made among the levels of strictness in non-CJK text:
+      only CJK codepoints are affected,
+      unless the text is marked as Chinese or Japanese,
+      in which case some additional common codepoints are affected.
+
+    <div class="example">
+      As UAs can add additional distinctions
+      between ''line-break/strict''/''line-break/normal''/''line-break/loose'' modes,
+      these values can exhibit other differences as well.
+      For example, a UA with sufficiently-advanced Thai language processing ability
+      could choose to map different levels of strictness in Thai line-breaking
+      to these keywords,
+      e.g. disallowing breaks within compound words in ''line-break/strict'' mode
+      (e.g. breaking ตัวอย่างการเขียนภาษาไทย as ตัวอย่าง·การเขียน·ภาษาไทย)
+      while allowing more breaks in ''line-break/loose''
+      (ตัวอย่าง·การ·เขียน·ภาษา·ไทย).
+    </div>
 
     <p class="note">The CSSWG recognizes that in a future edition of the
       specification finer control over line breaking may be necessary to

css-text-3/issues-lc-2013.txt

@@ -1437,3 +1437,24 @@ From:     Florian Rivoal
 Comment:  https://github.com/w3c/csswg-drafts/issues/2233
 Open:     =i18n= Respond.
 ----
+Issue 173.
+Summary:  Typo in Thai word-break example
+From:     Richard Ishida
+Comment:  https://github.com/w3c/csswg-drafts/issues/2455
+Closed:   Accepted
+----
+Issue 174.
+Summary:  Breakpoints in Thai word-break example too strict
+From:     Richard Ishida
+Comment:  https://github.com/w3c/csswg-drafts/issues/2455
+Comment:  https://github.com/w3c/csswg-drafts/issues/2455#issuecomment-374309942
+Comment:  https://github.com/w3c/csswg-drafts/issues/2455#issuecomment-375143091
+Comment:  https://github.com/w3c/csswg-drafts/issues/2455#issuecomment-375151681
+Open
+----
+Issue 175.
+Summary:  Thai should respond to line-break: strict|normal|loose
+From:     Florian Rivoal, James Clark
+Comment:  https://github.com/w3c/csswg-drafts/issues/2455#issuecomment-375155972
+Comment:  https://github.com/w3c/csswg-drafts/issues/2455#issuecomment-375151681
+Response: https://github.com/w3c/csswg-drafts/issues/2455#issuecomment-375162188