don't preserve whitespace

Author: mmalerba

src/lib/sidenav/drawer.ts

@@ -63,6 +63,7 @@ export class MdDrawerToggleResult {
   },
   changeDetection: ChangeDetectionStrategy.OnPush,
   encapsulation: ViewEncapsulation.None,
+  preserveWhitespaces: false,
 })
 export class MdDrawerContent implements AfterContentInit {
   /**

src/lib/sidenav/sidenav.ts

@@ -28,6 +28,7 @@ import {coerceBooleanProperty, coerceNumberProperty} from '@angular/cdk/coercion
   },
   changeDetection: ChangeDetectionStrategy.OnPush,
   encapsulation: ViewEncapsulation.None,
+  preserveWhitespaces: false,
 })
 export class MdSidenavContent extends MdDrawerContent {
   constructor(