Fix typo and grammar.

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/parkinglot@485 e5f2f494-b856-4b98-b285-d166d9295462

README

@@ -23,8 +23,8 @@ make perform-coverage
 	Runs the C++ tests (using googletests framework).
 
 make report-coverage
-	Generates the coverage HTML, excludes some unrelated headers.
-	The HTML reports are places in a directory called coverage/.
+	Generates the coverage HTML, excluding some unrelated headers.
+	The HTML reports are placed in a directory called coverage/.
 
 RUNNING