fixed type

Author: howcom

css3-values/Overview.src.html

@@ -538,7 +538,7 @@ <h4>The 'calc', 'min' and 'max' functions</h4>
 type, a PERCENTAGE token in the expression has the target type;
 otherwise percentages are not allowed and must be a parse error.
 
-<p>To make expressions simpler, operators have restriction on the
+<p>To make expressions simpler, operators have restrictions on the
 types they accept. At each operator, the types of the left and right
 side have to be checked for these restrictions. If compatible, they
 return roughly as follows (the following ignores precedence rules on