removed reference to button color and gradient

Changed the wording to reflect the default button's new look since it's no longer grey and doesn't have a gradient. I'd say this new wording isn't ideal and needs something a bit more, well, descriptive.
removed extraneous space
remove .btn-group

The example doesn't use .btn-group and adding the class causes "bad things to happen," as the saying goes.

http://jsfiddle.net/josephtate/g6AWF
Add role="button" to <a> buttons

These should really be <button> elements, but until that gets squared away, this will suffice.
Add even more  role="button" attributes

Missed the <a class="btw" in my regex search
Merge pull request #9996 from jodytate/master

changed description of default button
grunt dist on glyphicons width change
Merge pull request #10112 from kevinSuttle/button-roles

Add role="button" to <a> buttons
fixes #9887: documents show and hide classes
Merge branch 'master' of github.com:twbs/bootstrap
update raw files (should fix builds)
Fixes #9008: remove `alert-block` class from example
Merge pull request #10128 from leoj3n/alert-block-remove

Fixes #9008: remove `alert-block` class from example
Corrected 3.0 responsive utility class reference mapping when migrating from 2.x (now accounting for new Large device support.) Also synchronized breakpoint values from Grid options > Media queries, for clarity.
Merge pull request #10129 from pixelchutes/fix-3.0-migration-changes

Corrected 3.0 responsive utility class reference mapping when migrating ...
correct enable selector for button usage

following the given examples the correct selector to enable the buttons with javascript is ".btn-group".
Correct Typo
Merge pull request #10148 from originell/patch-1

Correct Typo
javascript.html: add data-ride note

carousel docs were missing mention of the data-ride attribute
used to automatically start the carousel at load time
Merge pull request #10146 from unwiredben/master

javascript.html: add data-ride note