Make error messages consistent

Author: sebastianbergmann

PHP/CodeCoverage/Driver/HHVM.php

@@ -63,7 +63,7 @@ class PHP_CodeCoverage_Driver_HHVM implements PHP_CodeCoverage_Driver
     public function __construct()
     {
         if (!function_exists('fb_enable_code_coverage')) {
-            throw new PHP_CodeCoverage_Exception('You need HHVM for this driver');
+            throw new PHP_CodeCoverage_Exception('This driver requires HHVM');
         }
     }
 

PHP/CodeCoverage/Driver/Xdebug.php

@@ -63,12 +63,12 @@ class PHP_CodeCoverage_Driver_Xdebug implements PHP_CodeCoverage_Driver
     public function __construct()
     {
         if (!extension_loaded('xdebug')) {
-            throw new PHP_CodeCoverage_Exception('Xdebug is not loaded.');
+            throw new PHP_CodeCoverage_Exception('This driver requires Xdebug');
         }
 
         if (!ini_get('xdebug.coverage_enable')) {
             throw new PHP_CodeCoverage_Exception(
-              'You need to set xdebug.coverage_enable=On in your php.ini.'
+              'xdebug.coverage_enable=On has to be set in php.ini'
             );
         }
     }