add docs for Unicode entities in #2978

diff --git a/docs/users_guide/glasgow_exts.xml b/docs/users_guide/glasgow_exts.xml
index 5bcaa1b..f6699ed 100644 (file)
--- a/docs/users_guide/glasgow_exts.xml
+++ b/docs/users_guide/glasgow_exts.xml
@@ -351,6 +351,15 @@ Indeed, the bindings can even be recursive.
              <entry>Name</entry>
            </row>
          </thead>
+
+<!--
+               to find the DocBook entities for these characters, find
+               the Unicode code point (e.g. 0x2237), and grep for it in
+               /usr/share/sgml/docbook/xml-dtd-*/ent/* (or equivalent on
+               your system.  Some of these Unicode code points don't have
+               equivalent DocBook entities.
+            -->
+
          <tbody>
            <row>
              <entry><literal>::</literal></entry>
@@ -399,6 +408,52 @@ Indeed, the bindings can even be recursive.
              <entry>MIDLINE HORIZONTAL ELLIPSIS</entry>
            </row>
           </tbody>
+
+         <tbody>
+           <row>
+             <entry>-&lt;</entry>
+             <entry>&larrtl;</entry>
+             <entry>0x2919</entry>
+             <entry>LEFTWARDS ARROW-TAIL</entry>
+           </row>
+          </tbody>
+
+         <tbody>
+           <row>
+             <entry>&gt;-</entry>
+             <entry>&rarrtl;</entry>
+             <entry>0x291A</entry>
+             <entry>RIGHTWARDS ARROW-TAIL</entry>
+           </row>
+          </tbody>
+
+         <tbody>
+           <row>
+             <entry>-&lt;&lt;</entry>
+             <entry></entry>
+             <entry>0x291B</entry>
+             <entry>LEFTWARDS DOUBLE ARROW-TAIL</entry>
+           </row>
+          </tbody>
+
+         <tbody>
+           <row>
+             <entry>&gt;&gt;-</entry>
+             <entry></entry>
+             <entry>0x291C</entry>
+             <entry>RIGHTWARDS DOUBLE ARROW-TAIL</entry>
+           </row>
+          </tbody>
+
+         <tbody>
+           <row>
+             <entry>*</entry>
+             <entry>&starf;</entry>
+             <entry>0x2605</entry>
+             <entry>BLACK STAR</entry>
+           </row>
+          </tbody>
+
         </tgroup>
       </informaltable>
     </sect2>