Fix broken URI fragments and redirects.

scss/_card.scss

@@ -153,7 +153,7 @@
 
     .card {
       display: flex;
-      // Flexbugs #4: https://github.com/philipwalton/flexbugs#4-flex-shorthand-declarations-with-unitless-flex-basis-values-are-ignored
+      // Flexbugs #4: https://github.com/philipwalton/flexbugs#flexbug-4
       flex: 1 0 0%;
       flex-direction: column;
       margin-right: $card-deck-margin;
@@ -183,7 +183,7 @@
     // The child selector allows nested `.card` within `.card-group`
     // to display properly.
     > .card {
-      // Flexbugs #4: https://github.com/philipwalton/flexbugs#4-flex-shorthand-declarations-with-unitless-flex-basis-values-are-ignored
+      // Flexbugs #4: https://github.com/philipwalton/flexbugs#flexbug-4
       flex: 1 0 0%;
       margin-bottom: 0;
 

scss/_print.scss

@@ -14,7 +14,7 @@
     *::before,
     *::after {
       // Bootstrap specific; comment out `color` and `background`
-      //color: $black !important; // Black prints faster: http://www.sanbeiji.com/archives/953
+      //color: $black !important; // Black prints faster
       text-shadow: none !important;
       //background: transparent !important;
       box-shadow: none !important;

scss/bootstrap-grid.scss

@@ -1,5 +1,5 @@
 /*!
- * Bootstrap Grid v4.0.0 (https://getbootstrap.com)
+ * Bootstrap Grid v4.0.0 (https://getbootstrap.com/)
  * Copyright 2011-2018 The Bootstrap Authors
  * Copyright 2011-2018 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

scss/bootstrap-reboot.scss

@@ -1,5 +1,5 @@
 /*!
- * Bootstrap Reboot v4.0.0 (https://getbootstrap.com)
+ * Bootstrap Reboot v4.0.0 (https://getbootstrap.com/)
  * Copyright 2011-2018 The Bootstrap Authors
  * Copyright 2011-2018 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)

scss/bootstrap.scss

@@ -1,5 +1,5 @@
 /*!
- * Bootstrap v4.0.0 (https://getbootstrap.com)
+ * Bootstrap v4.0.0 (https://getbootstrap.com/)
  * Copyright 2011-2018 The Bootstrap Authors
  * Copyright 2011-2018 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)