docs(overlay): fix duplicated word (#9897)

johanchouquet · andrewseguin · commit ba05b535d6ab · 2018-02-20T14:43:08.000-08:00
diff --git a/src/cdk/overlay/overlay.ts b/src/cdk/overlay/overlay.ts
@@ -29,7 +29,7 @@ let nextUniqueId = 0;
 
 /**
  * Service to create Overlays. Overlays are dynamically added pieces of floating UI, meant to be
- * used as a low-level building building block for other components. Dialogs, tooltips, menus,
+ * used as a low-level building block for other components. Dialogs, tooltips, menus,
  * selects, etc. can all be built using overlays. The service should primarily be used by authors
  * of re-usable components rather than developers building end-user applications.
  *

Original file line number	Diff line number	Diff line change
`@@ -29,7 +29,7 @@ let nextUniqueId = 0;`
`29`	`29`
`30`	`30`	`/**`
`31`	`31`	`* Service to create Overlays. Overlays are dynamically added pieces of floating UI, meant to be`
`32`		`- * used as a low-level building building block for other components. Dialogs, tooltips, menus,`
	`32`	`+ * used as a low-level building block for other components. Dialogs, tooltips, menus,`
`33`	`33`	`* selects, etc. can all be built using overlays. The service should primarily be used by authors`
`34`	`34`	`* of re-usable components rather than developers building end-user applications.`
`35`	`35`	`*`