add button to toggle the optional theme when viewing the docs; fixes #9764
regenerate minified docs JS & CSS
add link to StackOverflow question regarding Android <select> bug
Remove unneeded spaces from `pre`.
Adjust for Scrollspy offset when calculating maxScroll.
Add Scrollspy maxScroll with offset test.
bump grunt-saucelabs to v5.1.3
Merge pull request #13594 from twbs/bump-saucelabs

bump grunt-saucelabs to v5.1.3
Add tooltip self-reference to address #12320

primarily adds a data- attribute to the tooltip (and thus, the popover)
to create a self-reference.
change note in .resizable() mixin for accuracy

Not a Safari bug. It's standards-compliant.

Quoting from http://www.w3.org/TR/css3-ui/#resize :
> ### 8.1. `resize` property
>
> * Applies to: elements with `overflow` other than `visible`
>
> The `resize` property applies to elements whose computed `overflow` value is something other than `visible`.

Original comment was added in commit 648c4689273647c321dd6e3979d910282e9a9339.
more precise docs link
reference other more recent source regarding the IE viewport bug
docs: sort tooltip & container options for sanity
add 'viewport' option to popover docs; #12328 erratum
add multiple triggers info to popover docs
add 'selector' option motivation to tooltip docs
add 'container' option motivation to tooltip docs
update default 'template' value in popover docs
Merge pull request #13601 from twbs/tooltip-popover-doc

Sync tooltip & popover docs
Adds aria described by to tooltip plugin for accessibility

Generates a unique id for tooltip and adds [aria-describedby] to the element
it is called on. Resolves issue #13480

- set up test
- linted the code styles
- passed the tests
- integrated feedback from @cvrebert