Fixed annotation
merged branch enumag/patch-2 (PR #8912)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #8912).

Discussion
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Fixed annotation

See #8910.

Commits
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18ce361 Fixed annotation
Use isset() instead of array_key_exists() in DIC
merged branch catch56/container_array_key_exists (PR #8907)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #8907).

Discussion
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Use isset() instead of array_key_exists() in DIC

It doesn't look like the array_key_exists() in Container::get() and Container::has() is necessary. Changing this to isset() removed over 1,000 calls on a default Drupal 8 install - attaching before/after xhprof screenshots with this change.

![screen shot 2013-09-01 at 1 13 41 pm](https://f.cloud.github.com/assets/116285/1063965/d826057c-1300-11e3-96c3-2c94b89fe83a.png)

![screen shot 2013-09-01 at 1 13 49 pm](https://f.cloud.github.com/assets/116285/1063961/99a0f7b2-1300-11e3-9bd2-b0bf22d4245e.png)

Commits
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3c01ae6 Use isset() instead of array_key_exists() in DIC