example -> expr

Rev: refdoc/chapters/data_types.xml:1.4

refdoc/chapters/data_types.xml

@@ -709,11 +709,11 @@ section again.</p>
 <dt> compiling</dt>
 <dd> All programs are generated by compiling a string. The string may of
      course be read from a file. For this purpose there are three functions:
-<example>
+<expr>
 program compile(string p);
 program compile_file(string filename);
 program compile_string(string p, string filename);
-</example>
+</expr>
      <tt>compile_file</tt> simply reads the file given as argument, compiles
      it and returns the resulting program. <tt>compile_string</tt> instead
      compiles whatever is in the string <i>p</i>. The second argument,