Update README.markdown: wording

Co-authored-by: Ryan Scott <[email protected]>

Author: ulysses4ever

README.markdown

@@ -13,14 +13,14 @@ Haskell easy.
 * The simple API hides a lot of automation and details that you
   shouldn't need to worry about.
 
-* Sophisticated, high-resolution analysis can accurately measure
+* Sophisticated, high-resolution analysis which can accurately measure
   operations that run in as little as a few hundred picoseconds.
 
-* [Output to active HTML](https://hackage.haskell.org/package/criterion/src/www/report.html) (with Javascript charts), CSV,
-  and JSON.  Write your own report templates to customize exactly how
+* [Output to active HTML](https://hackage.haskell.org/package/criterion/src/www/report.html) (with JavaScript charts), CSV,
+  and JSON. Write your own report templates to customize exactly how
   your results are presented.
 
-* Linear regression model allows measurement of the effects of garbage
+* Linear regression model that allows measuring the effects of garbage
   collection and other factors.
 
 * Measurements are cross-validated to ensure that sources of