doc/concepts.tex: Make a footnote a bit less stuffy.

diff --git a/doc/concepts.tex b/doc/concepts.tex
index 6ec27b9..4f192f5 100644 (file)
--- a/doc/concepts.tex
+++ b/doc/concepts.tex
@@ -820,7 +820,7 @@ The aggregating method combinations provided are as follows.
 \item[progn] The message must return @|void|.  The applicable primary methods
   are simply invoked in turn, most specific first.
 \item[sum] The message must return a numeric type.\footnote{%
-    The Sod translator does not check this, since it doesn't have enough
+    The Sod translator doesn't check this, since it doesn't have enough
     insight into @|typedef| names.} %
   The applicable primary methods are invoked in turn, and their return values
   added up.  The final result is the sum of the individual values.