documentation fix on validators

Spelling mistake correction in documentation

link_to_route requires 3 parameters if wildcard values are required

Added missing 's' in the word 'is' (Laravel Overview).
Signed-off-by: matz3 <osswaldm94@gmail.com>

minor grammar update in docs

Performance enhancement for Str Class (see pull request #1180)

Fixed a problem with `Eloquent::get_dirty`

Fixes language URI routing issue

Correct broken links in docs

Fix a tiny typo

Auth token now nulled on logout

[#1261] get_key now pulls from $original instead

This is in reference to issue #1261, where Model->get_key() returns
the key from the $attributes instead of from the $original property.
This breaks the functionality of a model with a primary key that may
change, as the SQL generated will be something like:

UPDATE `model` SET `key` = 'new-key' WHERE `key` = 'new-key';

Which won't update the model in the database.