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
WIP - feat(core): add methods `every()` and `some()` (similar to `forEach()`)

NOTICE: This is just a POC implementation to see if there is interest for the feature.
        There are many performance improvements to be made and tests to be written (and run).
Sometimes it is useful to be able to iterate over an array/object, but abort the operation as soon
as some condition is met. This commit adds two methods that provide this functionality:
1. some:  Test whether some element in the array/object passes the test implemented by the provided
          function.
2. every: Test whether every element in the array/object passes the test implemented by the provided
          function.

Closes #263