Merge branch 'master' into v4

Conflicts:
	_config.yml
	dist/css/bootstrap-theme.css
	dist/css/bootstrap-theme.css.map
	dist/css/bootstrap-theme.min.css
	dist/css/bootstrap.css
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	dist/js/bootstrap.min.js
	docs/_includes/components/thumbnails.html
	docs/_includes/css/forms.html
	docs/_includes/css/grid.html
	docs/_includes/customizer-variables.html
	docs/_includes/footer.html
	docs/_includes/getting-started/download.html
	docs/_includes/getting-started/template.html
	docs/_includes/js/overview.html
	docs/_includes/js/popovers.html
	docs/_includes/js/tooltips.html
	docs/assets/css/docs.min.css
	docs/assets/js/customize.min.js
	docs/assets/js/raw-files.min.js
	docs/assets/js/src/customizer.js
	docs/dist/css/bootstrap-theme.css
	docs/dist/css/bootstrap-theme.css.map
	docs/dist/css/bootstrap-theme.min.css
	docs/dist/css/bootstrap.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css
	docs/dist/js/bootstrap.js
	docs/dist/js/bootstrap.min.js
	docs/examples/navbar-fixed-top/index.html
	docs/examples/navbar-static-top/index.html
	docs/examples/non-responsive/index.html
	docs/examples/theme/index.html
	grunt/configBridge.json
	less/alerts.less
	less/badges.less
	less/jumbotron.less
	less/panels.less
	less/tables.less
	less/theme.less
	less/variables.less
	package.json
	scss/_button-group.scss
	scss/_buttons.scss
	scss/_forms.scss

docs/layout/grid.md

@@ -355,7 +355,7 @@ Move columns to the right using `.col-md-offset-*` classes. These classes increa
 
 ### Example: Nesting columns
 
-To nest your content with the default grid, add a new `.row` and set of `.col-sm-*` columns within an existing `.col-sm-*` column. Nested rows should include a set of columns that add up to 12 or less (it is not required that you use all 12 available columns).
+To nest your content with the default grid, add a new `.row` and set of `.col-sm-*` columns within an existing `.col-sm-*` column. Nested rows should include a set of columns that add up to 12 or fewer (it is not required that you use all 12 available columns).
 
 {% example html %}
 <div class="row">