add a rule that cuts down on margins for program listings that are inside of a table. This is particularly relevant to the date-time docs which use this form extensively.

[SVN r27353]

doc/html/boostbook.css

@@ -138,6 +138,17 @@ div.informaltable table tr th, div.table table tr th
     border: 1pt solid white;
 }
 
+/* screen & programlisting, when used in a table cell, do not
+   need the extra padding and margin normally used */
+
+td .screen, td .programlisting
+{
+    display: block;
+    margin-left: 0%;
+    margin-right: 0%;
+    padding: 0.5pc 0.5pc 0.5pc 0.5pc;
+}
+
 /* inlined images */
 .inlinemediaobject
 {