[css-text-3] Clarify handling of eol collapsible spaces with bidi

Closes #4308

Author: frivoal

css-text-3/Overview.bs

@@ -1629,6 +1629,13 @@ Text Processing</h3>
           white-space-processing-046.xht
           white-space-processing-047.xht
         </wpt>
+
+        In the case of bidirectional text,
+        any [=collapsible=] [=space=] located at the end of the line
+        prior to <a href="https://www.w3.org/TR/css-writing-modes/#text-direction">bidi reordering</a> [[CSS-WRITING-MODES-3]]
+        is also removed,
+        and bidi reordering is applied on the remaining content of the line.
+
       <li>If there remains any sequence of <a>white space</a>,
         and/or [=other space separators=],
         at the end of a line:
@@ -5408,6 +5415,7 @@ Changes</h2>
     (<a href="https://github.com/w3c/csswg-drafts/issues/3440">Issue 3440</a>)
   * Generalize the logic that handles spaces at the end of lines to
     sequences of Unicode Zs spaces (except NBSP), not just of Space U+0020.
+  * Clarify the interaction of collapslible spaces at the end of a line and bidi.
 
   <h3 class="no-num" id="changes-2018-12-06">
   Changes from the <a href="https://www.w3.org/TR/2018/WD-css-text-3-20181206/">6 December 2018 Working Draft</a></h3>

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

@@ -1165,24 +1165,24 @@ <h1>CSS Text Level 3 Disposition of Comments for 2013-10-10 LCWD</h1>
 <span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/643'>https://github.com/w3c/csswg-drafts/issues/643</a></span>
 <span>Response: <a href='https://github.com/w3c/csswg-drafts/issues/643#issuecomment-270095107'>https://github.com/w3c/csswg-drafts/issues/643#issuecomment-270095107</a></span>
 <span class="oi">Closed:   Invalid</span></pre>
-<pre class=' a' id='issue-http://www.w3.org/mid/'>
-<span>129.</span>
+<pre class=' a' id='issue-129'>
+<span>Issue 129. <a href='#issue-129'>#</a></span>
 <span>Summary:  Line breaking opportunities at element boundaries</span>
 <span>From:     Florian Rivoal</span>
 <span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/189'>https://github.com/w3c/csswg-drafts/issues/189</a></span>
 <span class="a">Closed:   Accepted</span>
 <span>Resolved: <a href='http://www.w3.org/mid/CADhPm3sdQu4f--SaXtQdyOBwE-2V3KCkxGhxvLezcKR_QiDggQ@mail.gmail.com'>http://www.w3.org/mid/CADhPm3sdQu4f--SaXtQdyOBwE-2V3KCkxGhxvLezcKR_QiDggQ@mail.gmail.com</a> <a href="mid:CADhPm3sdQu4f--SaXtQdyOBwE-2V3KCkxGhxvLezcKR_QiDggQ@mail.gmail.com"><abbr title="Open Message">&#x2386;</abbr></a></span></pre>
-<pre class=' a' id='issue-http://www.w3.org/mid/'>
-<span>130.</span>
+<pre class=' a' id='issue-130'>
+<span>Issue 130. <a href='#issue-130'>#</a></span>
 <span>Summary:  Allow automatic hyphenation even with real hyphens</span>
 <span>From:     Florian Rivoal</span>
 <span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/618'>https://github.com/w3c/csswg-drafts/issues/618</a></span>
 <span>Response:</span>
 <span class="r">Closed:   Rejected</span>
 <span>Resolved: <a href='http://www.w3.org/mid/CADhPm3tYFzkjRfJ1A77jK_-Qj-Jq1k__2GgaV8=_KrWgJEdAFA@mail.gmail.com'>http://www.w3.org/mid/CADhPm3tYFzkjRfJ1A77jK_-Qj-Jq1k__2GgaV8=_KrWgJEdAFA@mail.gmail.com</a> <a href="mid:CADhPm3tYFzkjRfJ1A77jK_-Qj-Jq1k__2GgaV8=_KrWgJEdAFA@mail.gmail.com"><abbr title="Open Message">&#x2386;</abbr></a></span>
 <span class="a">Verified: <a href='http://www.w3.org/mid/CADhPm3tYFzkjRfJ1A77jK_-Qj-Jq1k__2GgaV8=_KrWgJEdAFA@mail.gmail.com'>http://www.w3.org/mid/CADhPm3tYFzkjRfJ1A77jK_-Qj-Jq1k__2GgaV8=_KrWgJEdAFA@mail.gmail.com</a> <a href="mid:CADhPm3tYFzkjRfJ1A77jK_-Qj-Jq1k__2GgaV8=_KrWgJEdAFA@mail.gmail.com"><abbr title="Open Message">&#x2386;</abbr></a></span></pre>
-<pre class=' a' id='issue-http://www.w3.org/mid/'>
-<span>131.</span>
+<pre class=' a' id='issue-131'>
+<span>Issue 131. <a href='#issue-131'>#</a></span>
 <span>Summary:  Segment breaks should collapse before transformation</span>
 <span>From:     Xidorn Quan</span>
 <span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/836'>https://github.com/w3c/csswg-drafts/issues/836</a></span>
@@ -1826,6 +1826,14 @@ <h1>CSS Text Level 3 Disposition of Comments for 2013-10-10 LCWD</h1>
 <span>Response: <a href='https://github.com/w3c/csswg-drafts/issues/3518#issuecomment-454251243'>https://github.com/w3c/csswg-drafts/issues/3518#issuecomment-454251243</a></span>
 <span class="a">Closed:   Accepted</span>
 <span>Resolved: Editor discretion</span></pre>
+<pre class=' a' id='issue-208'>
+<span>Issue 208. <a href='#issue-208'>#</a></span>
+<span>Summary:  Define removal of end-of-line spaces in bidi situations</span>
+<span>From:     Elika Etemad</span>
+<span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/4308'>https://github.com/w3c/csswg-drafts/issues/4308</a></span>
+<span>Response: <a href='https://github.com/w3c/csswg-drafts/issues/4308#issuecomment-537741933'>https://github.com/w3c/csswg-drafts/issues/4308#issuecomment-537741933</a></span>
+<span class="a">Closed:   Accepted</span>
+<span>Resolved: <a href='https://github.com/w3c/csswg-drafts/issues/4308#issuecomment-542788301'>https://github.com/w3c/csswg-drafts/issues/4308#issuecomment-542788301</a></span></pre>
 <script>
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 	var sheet = document.styleSheets[0];

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

@@ -1134,14 +1134,14 @@ Comment:  https://github.com/w3c/csswg-drafts/issues/643
 Response: https://github.com/w3c/csswg-drafts/issues/643#issuecomment-270095107
 Closed:   Invalid
 ----
-129.
+Issue 129.
 Summary:  Line breaking opportunities at element boundaries
 From:     Florian Rivoal
 Comment:  https://github.com/w3c/csswg-drafts/issues/189
 Closed:   Accepted
 Resolved: http://www.w3.org/mid/CADhPm3sdQu4f--SaXtQdyOBwE-2V3KCkxGhxvLezcKR_QiDggQ@mail.gmail.com
 ----
-130.
+Issue 130.
 Summary:  Allow automatic hyphenation even with real hyphens
 From:     Florian Rivoal
 Comment:  https://github.com/w3c/csswg-drafts/issues/618
@@ -1150,7 +1150,7 @@ Closed:   Rejected
 Resolved: http://www.w3.org/mid/CADhPm3tYFzkjRfJ1A77jK_-Qj-Jq1k__2GgaV8=_KrWgJEdAFA@mail.gmail.com
 Verified: http://www.w3.org/mid/CADhPm3tYFzkjRfJ1A77jK_-Qj-Jq1k__2GgaV8=_KrWgJEdAFA@mail.gmail.com
 ----
-131.
+Issue 131.
 Summary:  Segment breaks should collapse before transformation
 From:     Xidorn Quan
 Comment:  https://github.com/w3c/csswg-drafts/issues/836
@@ -1795,3 +1795,10 @@ Response: https://github.com/w3c/csswg-drafts/issues/3518#issuecomment-454251243
 Closed:   Accepted
 Resolved: Editor discretion
 ----
+Issue 208.
+Summary:  Define removal of end-of-line spaces in bidi situations
+From:     Elika Etemad
+Comment:  https://github.com/w3c/csswg-drafts/issues/4308
+Response: https://github.com/w3c/csswg-drafts/issues/4308#issuecomment-537741933
+Closed:   Accepted
+Resolved: https://github.com/w3c/csswg-drafts/issues/4308#issuecomment-542788301