fix breadcrumbs libsass content

dist/css/bootstrap.css

@@ -4,6 +4,7 @@
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
+@charset "UTF-8";
 /*! normalize.css v3.0.3 | MIT License | github.com/necolas/normalize.css */
 html {
   font-family: sans-serif;
@@ -4236,7 +4237,7 @@ input[type="button"].btn-block {
   padding-right: .5rem;
   padding-left: .5rem;
   color: #818a91;
-  content: "/\\00a0";
+  content: "/ ";
 }
 
 .breadcrumb > .active {

docs/dist/css/bootstrap.css

@@ -4,6 +4,7 @@
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
  */
 
+@charset "UTF-8";
 /*! normalize.css v3.0.3 | MIT License | github.com/necolas/normalize.css */
 html {
   font-family: sans-serif;
@@ -4236,7 +4237,7 @@ input[type="button"].btn-block {
   padding-right: .5rem;
   padding-left: .5rem;
   color: #818a91;
-  content: "/\\00a0";
+  content: "/ ";
 }
 
 .breadcrumb > .active {

scss/_breadcrumb.scss

@@ -14,10 +14,11 @@
     display: inline-block;
 
     + li:before {
+      $nbsp: "\00a0";
       padding-right: .5rem;
       padding-left: .5rem;
       color: $breadcrumb-divider-color;
-      content: "#{$breadcrumb-divider}\00a0"; // Unicode space added since inline-block means non-collapsing white-space
+      content: "#{$breadcrumb-divider}#{$nbsp}"; // Unicode space added since inline-block means non-collapsing white-space
     }
   }