list items block level, just removes default browser padding and list-style\n@mixin list-unstyled() {\n  padding-left: 0;\n  list-style: none;\n}\n","// Responsive images (ensure images don't scale beyond their parents)\n//\n// This is purposefully opt-in via an explicit class rather than being the default for all `<img>`s.\n// We previously tried the \"images are responsive by default\" approach in Bootstrap v2,\n// and abandoned it in Bootstrap v3 because it breaks lots of third-party widgets (including...