Instead of return path of the type directive names just return type d…

…irective names

src/compiler/program.ts

@@ -1076,7 +1076,10 @@ namespace ts {
             if (typeRoots) {
                 for (const root of typeRoots) {
                     if (host.directoryExists(root)) {
-                        result = result.concat(host.getDirectories(root));
+                        for (const typeDirectivePath of host.getDirectories(root)) {
+                            // Return just the type directive names
+                            result = result.concat(getBaseFileName(normalizePath(typeDirectivePath)));
+                        }
                     }
                 }
             }

src/services/services.ts

@@ -1884,7 +1884,7 @@ namespace ts {
         };
     }
 
-    // Cache host information about scrip Should be refreshed
+    // Cache host information about script should be refreshed
     // at each language service public entry point, since we don't know when
     // set of scripts handled by the host changes.
     class HostCache {