Fixing typo.

README.rdoc

@@ -35,7 +35,7 @@ Currently Jessie ships with 3 formatters: progress, nested and xunit. By default
   jessie -f [formatter_name] spec
 
 * Special note on *xunit*:
-Since this formatter is more useful when in a Continuous Integration environment, sendind its output to an XML file would be the most common thing to do.
+Since this formatter is more useful when in a Continuous Integration environment, sending its output to an XML file would be the most common thing to do.
 Given that Jessie creates separate processes to execute the tests, simply sending the output to a file like "jessie -f xunit spec > test_results.xml" wouldn't work most of the times. So the following does the trick:
 
   jessie -f xunit spec | cat > test_results.xml