diff --git a/doc/gf-history.html b/doc/gf-history.html
index 2e7f390b5..d50f42075 100644
--- a/doc/gf-history.html
+++ b/doc/gf-history.html
@@ -12,21 +12,28 @@ Changes in functionality since May 17, 2005, release of GF Version 2.2
 
 </center>
 
+<p>
+
 20/9 (AR) Added optimization by <b>common subexpression elimination</b>.
-It works on GFC modules and creates $oper$ definitions for
-subterms that occur more than once in $lin$ definitions. These
-$oper$ definitions are automatically reinlined in functionalities
-that don't support $oper$s in GFC. This conversion is done by
-module and the $oper$s are not inherited. Moreover, the subterms
-can contain free variables which means that the $oper$s are not
+It works on GFC modules and creates <tt>oper</tt> definitions for
+subterms that occur more than once in <tt>lin</tt> definitions. These
+<tt>oper</tt> definitions are automatically reinlined in functionalities
+that don't support <tt>oper</tt>s in GFC. This conversion is done by
+module and the <tt>oper</tt>s are not inherited. Moreover, the subterms
+can contain free variables which means that the <tt>oper</tt>s are not
 always well typed. However, since all variables in GFC are type-specific
-(and local variables are $lin$-specific), this does not destroy
+(and local variables are <tt>lin</tt>-specific), this does not destroy
 subject reduction or cause illegal captures. 
 <br>
 The optimization is triggered by the flag <tt>optimize=OPT_subs</tt>,
 where <tt>OPT</tt> is any of the other optimizations (see <tt>h -optimize</tt>).
 The most aggressive value of the flag is <tt>all_subs</tt>. In experiments,
-the size of a GFC module can shrink by 80% compared to plain <tt>all</tt>.
+the size of a GFC module can shrink by 85% compared to plain <tt>all</tt>.
+
+<p>
+
+18/9 (AR) Removed superfluous spaces from GFC printing. This shrinks
+the GFC size by 5-10%.
 
 <p>