Improved grammar

README.md

@@ -23,7 +23,7 @@ of thumb goes without saying: "no green, no commit".
 
 ### timestamp.pl ###
 
-Script to measure how long mone second takes.  For those that know how long
+Script to measure how long does one second take.  For those that know how long
 one second takes, it can serve as a snippet for Perl `&stamp()`.