core: Prefixed UI only requests bolding if not specified at instance-level

lib/vagrant/ui.rb

@@ -221,7 +221,7 @@ module Vagrant
         class_eval <<-CODE
           def #{method}(message, *args, **opts)
             super(message)
-            if !opts.has_key?(:bold)
+            if !@ui.opts.has_key?(:bold) && !opts.has_key?(:bold)
               opts[:bold] = #{method.inspect} != :detail && \
                 #{method.inspect} != :ask
             end

test/unit/vagrant/ui_test.rb

@@ -255,7 +255,7 @@ describe Vagrant::UI::Prefixed do
       subject.detail("foo\nbar")
     end
 
-    it "doesn't prefix if requestsed" do
+    it "doesn't prefix if requested" do
       ui.should_receive(:detail).with("foo", prefix: false, bold: false)
       subject.detail("foo", prefix: false)
     end
@@ -300,5 +300,11 @@ describe Vagrant::UI::Prefixed do
       ui.should_receive(:output).with("==> #{prefix}: foo", bold: true)
       subject.output("foo")
     end
+
+    it "does not request bolding if class-level disabled" do
+      ui.opts[:bold] = false
+      ui.should_receive(:output).with("==> #{prefix}: foo", {})
+      subject.output("foo")
+    end
   end
 end