docs(guide/bootstrap): link to batarang
docs(guide/services): use array annotation in example
docs(guide/*): improve explanation of strictDi

Closes #9786
chore(docs): clarify comment which was copy&paste from dgeni example

It makes people happy, so why not

Closes #9798
docs(guide/*): fix typos and links

Fix some typos and link-errors introduced in
https://github.com/angular/angular.js/commit/d1ccf176351cda2b49599374c7d4ba594796012f.

Related to #9786
Closes #9800