Fix(plural rule): IDE's to IDEs

Author: lknknm

clang/www/features.html

@@ -246,7 +246,7 @@ <h3 id="ideintegration">Integration with IDEs</h3>
 <!--=======================================================================-->
 
 <p>
-We believe that Integrated Development Environments (IDE's) are a great way
+We believe that Integrated Development Environments (IDEs) are a great way
 to pull together various pieces of the development puzzle, and aim to make clang
 work well in such an environment.  The chief advantage of an IDE is that they
 typically have visibility across your entire project and are long-lived