fixes #11449: use menlo over monaco

customize.html

@@ -399,7 +399,7 @@ base_url: "../"
         <input type="text" class="form-control" placeholder="Georgia, 'Times New Roman', Times, serif" data-var="@font-family-serif">
         <p class="help-block">Default serif fonts.</p>
         <label>@font-family-monospace</label>
-        <input type="text" class="form-control" placeholder="Monaco, Menlo, Consolas, 'Courier New', monospace" data-var="@font-family-monospace">
+        <input type="text" class="form-control" placeholder="Menlo, Monaco, Consolas, 'Courier New', monospace" data-var="@font-family-monospace">
         <p class="help-block">Default monospace fonts for <code>&lt;code&gt;</code> and <code>&lt;pre&gt;</code>.</p>
 
         <h4>Base type styes</h4>

dist/css/bootstrap.css

@@ -740,7 +740,7 @@ code,
 kbd,
 pre,
 samp {
-  font-family: Monaco, Menlo, Consolas, "Courier New", monospace;
+  font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
 }
 
 code {

less/variables.less

@@ -41,7 +41,7 @@
 
 @font-family-sans-serif:  "Helvetica Neue", Helvetica, Arial, sans-serif;
 @font-family-serif:       Georgia, "Times New Roman", Times, serif;
-@font-family-monospace:   Monaco, Menlo, Consolas, "Courier New", monospace;
+@font-family-monospace:   Menlo, Monaco, Consolas, "Courier New", monospace;
 @font-family-base:        @font-family-sans-serif;
 
 @font-size-base:          14px;