Bootstrap v4 libsass vs Ruby Sass.

$ git diff --ignore-blank-lines dist/css/bootstrap.css
diff --git a/dist/css/bootstrap.css b/dist/css/bootstrap.css
index d4c7193..2863300 100644
--- a/dist/css/bootstrap.css
+++ b/dist/css/bootstrap.css
@@ -2738,9 +2867,7 @@ fieldset[disabled] a.btn {
   background-color: #0275d8;
   border-color: #0275d8;
 }
-
-.btn-primary:active, .btn-primary.active,
-.show > .btn-primary.dropdown-toggle {
+.btn-primary:active, .btn-primary.active, .show > .btn-primary.dropdown-toggle {
   color: #fff;
   background-color: #025aa5;
   background-image: none;
@@ -2768,9 +2892,7 @@ fieldset[disabled] a.btn {
   background-color: #fff;
   border-color: #ccc;
 }
-
-.btn-secondary:active, .btn-secondary.active,
-.show > .btn-secondary.dropdown-toggle {
+.btn-secondary:active, .btn-secondary.active, .show > .btn-secondary.dropdown-toggle {
   color: #292b2c;
   background-color: #e6e6e6;
   background-image: none;
@@ -2798,9 +2917,7 @@ fieldset[disabled] a.btn {
   background-color: #5bc0de;
   border-color: #5bc0de;
 }
-
-.btn-info:active, .btn-info.active,
-.show > .btn-info.dropdown-toggle {
+.btn-info:active, .btn-info.active, .show > .btn-info.dropdown-toggle {
   color: #fff;
   background-color: #31b0d5;
   background-image: none;
@@ -2828,9 +2942,7 @@ fieldset[disabled] a.btn {
   background-color: #5cb85c;
   border-color: #5cb85c;
 }
-
-.btn-success:active, .btn-success.active,
-.show > .btn-success.dropdown-toggle {
+.btn-success:active, .btn-success.active, .show > .btn-success.dropdown-toggle {
   color: #fff;
   background-color: #449d44;
   background-image: none;
@@ -2858,9 +2967,7 @@ fieldset[disabled] a.btn {
   background-color: #f0ad4e;
   border-color: #f0ad4e;
 }
-
-.btn-warning:active, .btn-warning.active,
-.show > .btn-warning.dropdown-toggle {
+.btn-warning:active, .btn-warning.active, .show > .btn-warning.dropdown-toggle {
   color: #fff;
   background-color: #ec971f;
   background-image: none;
@@ -2888,9 +2992,7 @@ fieldset[disabled] a.btn {
   background-color: #d9534f;
   border-color: #d9534f;
 }
-
-.btn-danger:active, .btn-danger.active,
-.show > .btn-danger.dropdown-toggle {
+.btn-danger:active, .btn-danger.active, .show > .btn-danger.dropdown-toggle {
   color: #fff;
   background-color: #c9302c;
   background-image: none;
@@ -2919,9 +3018,7 @@ fieldset[disabled] a.btn {
   color: #0275d8;
   background-color: transparent;
 }
-
-.btn-outline-primary:active, .btn-outline-primary.active,
-.show > .btn-outline-primary.dropdown-toggle {
+.btn-outline-primary:active, .btn-outline-primary.active, .show > .btn-outline-primary.dropdown-toggle {
   color: #fff;
   background-color: #0275d8;
   border-color: #0275d8;
@@ -2949,9 +3043,7 @@ fieldset[disabled] a.btn {
   color: #ccc;
   background-color: transparent;
 }
-
-.btn-outline-secondary:active, .btn-outline-secondary.active,
-.show > .btn-outline-secondary.dropdown-toggle {
+.btn-outline-secondary:active, .btn-outline-secondary.active, .show > .btn-outline-secondary.dropdown-toggle {
   color: #fff;
   background-color: #ccc;
   border-color: #ccc;
@@ -2979,9 +3068,7 @@ fieldset[disabled] a.btn {
   color: #5bc0de;
   background-color: transparent;
 }
-
-.btn-outline-info:active, .btn-outline-info.active,
-.show > .btn-outline-info.dropdown-toggle {
+.btn-outline-info:active, .btn-outline-info.active, .show > .btn-outline-info.dropdown-toggle {
   color: #fff;
   background-color: #5bc0de;
   border-color: #5bc0de;
@@ -3009,9 +3093,7 @@ fieldset[disabled] a.btn {
   color: #5cb85c;
   background-color: transparent;
 }
-
-.btn-outline-success:active, .btn-outline-success.active,
-.show > .btn-outline-success.dropdown-toggle {
+.btn-outline-success:active, .btn-outline-success.active, .show > .btn-outline-success.dropdown-toggle {
   color: #fff;
   background-color: #5cb85c;
   border-color: #5cb85c;
@@ -3039,9 +3118,7 @@ fieldset[disabled] a.btn {
   color: #f0ad4e;
   background-color: transparent;
 }
-
-.btn-outline-warning:active, .btn-outline-warning.active,
-.show > .btn-outline-warning.dropdown-toggle {
+.btn-outline-warning:active, .btn-outline-warning.active, .show > .btn-outline-warning.dropdown-toggle {
   color: #fff;
   background-color: #f0ad4e;
   border-color: #f0ad4e;
@@ -3069,9 +3143,7 @@ fieldset[disabled] a.btn {
   color: #d9534f;
   background-color: transparent;
 }
-
-.btn-outline-danger:active, .btn-outline-danger.active,
-.show > .btn-outline-danger.dropdown-toggle {
+.btn-outline-danger:active, .btn-outline-danger.active, .show > .btn-outline-danger.dropdown-toggle {
   color: #fff;
   background-color: #d9534f;
   border-color: #d9534f;