Fix bug where obsolete strings were not removed when --clean was used. Closes #29

Author: Kim Biesbjerg

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@biesbjerg/ngx-translate-extract",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "description": "Extract strings from projects using ngx-translate",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",

src/cli/tasks/extract.task.ts

@@ -104,7 +104,7 @@ export class ExtractTask implements TaskInterface {
 
 				if (this._options.clean) {
 					const collectionCount = processedCollection.count();
-					processedCollection = processedCollection.intersect(processedCollection);
+					processedCollection = processedCollection.intersect(collection);
 					const removeCount = collectionCount - processedCollection.count();
 					if (removeCount > 0) {
 						this._out(chalk.dim('- removed %d obsolete strings'), removeCount);