docs: clarify library description

Author: jbogarthyde

packages/schematics/angular/library/library-long.md

@@ -1,4 +1,5 @@
 A library is a type of project that does not run independently.
 The library skeleton created by this command is placed by default in the `/projects` folder, and has `type` of "library".
 
-You can build a new library using the `ng build` command, and unit-test it and lint it using the `ng test` and `ng lint` commands.
+You can build a new library using the `ng build` command, run unit test for it using the `ng test` command,
+and lint it using  and the `ng lint` command.