Update styles for Ruby Sass compat

docs/getting-started/compiling.md

@@ -41,7 +41,7 @@ This is a convenience method for watching just Sass files and automatically buil
 
 ### Use another Sass compiler
 Bootstrap is compiled with [libsass][libsass] by default.
-Use another compiler by setting `TWBS_SASS` environment variable to:
+Use another compiler by setting the `TWBS_SASS` environment variable to:
 
 * `sass` to use [Ruby Sass][ruby-sass] via [grunt-contrib-sass][grunt-contrib-sass].
 * `libsass` (default) to use [libsass][libsass] via [grunt-sass][grunt-sass].

scss/_mixins.scss

@@ -57,3 +57,4 @@
 // @import "mixins/navbar-align";
 @import "mixins/grid-framework";
 @import "mixins/grid";
+@import "mixins/pulls";

scss/_navbar.scss

@@ -199,10 +199,10 @@
 
 @include media-sm {
   .navbar-left {
-    @extend .pull-left;
+    @include pull-left();
   }
   .navbar-right {
-    @extend .pull-right;
+    @include pull-right();
     margin-right: -$navbar-padding-horizontal;
 
     ~ .navbar-right {

scss/_type.scss

@@ -116,7 +116,7 @@ ol {
 
 // Inline turns list items into inline-block
 .list-inline {
-  @extend list-unstyled();
+  @extend .list-unstyled;
   margin-left: -5px;
 
   > li {

scss/_utilities.scss

@@ -10,11 +10,12 @@
 .center-block {
   @include center-block();
 }
+
 .pull-right {
-  float: right !important;
+  @include pull-right();
 }
 .pull-left {
-  float: left !important;
+  @include pull-left();
 }
 
 

scss/mixins/_pulls.scss

+@mixin pull-left {
+  float: left !important;
+}
+@mixin pull-right {
+  float: right !important;
+}