Write exception details using UI.error, and UI.error will now output "ERROR:" in red!

lib/guard.rb

@@ -59,13 +59,12 @@ module Guard
     # fire it if his work leads to a system failure
     def supervised_task(guard, task_to_supervise, *args)
       guard.send(task_to_supervise, *args)
-    rescue Exception => err
-      UI.error("#{guard.class.name} guard failed to achieve its <#{task_to_supervise.to_s}> command: #{err}")
-      warn "#{err.class}: #{err.message}"
-      warn err.backtrace.join("\n")
+    rescue Exception => ex
+      UI.error("#{guard.class.name} failed to achieve its <#{task_to_supervise.to_s}>, exception was:" +
+      "\n#{ex.class}: #{ex.message}\n#{ex.backtrace.join("\n")}")
       guards.delete guard
-      UI.info("Guard #{guard.class.name} has just been fired")
-      return err
+      UI.info("\n#{guard.class.name} has just been fired")
+      return ex
     end
 
     def run

lib/guard/ui.rb

@@ -12,7 +12,7 @@ module Guard
       def error(message, options = {})
         unless ENV["GUARD_ENV"] == "test"
           reset_line if options[:reset]
-          puts "ERROR: #{message}"
+          puts "#{color('ERROR:', ';31')} #{message}"
         end
       end
 
@@ -24,11 +24,7 @@ module Guard
       end
 
       def reset_line
-        if color_enabled?
-          print "\r\e[0m"
-        else
-          print "\r\n"
-        end
+        print(color_enabled? ? "\r\e[0m" : "\r\n")
       end
 
       def clear
@@ -38,15 +34,11 @@ module Guard
     private
 
       def reset_color(text)
-        color(text, "\e[0m")
+        color(text, "")
       end
 
       def color(text, color_code)
-        if color_enabled?
-          "#{color_code}#{text}\e[0m"
-        else
-          text
-        end
+        color_enabled? ? "\e[0#{color_code}m#{text}\e[0m" : text
       end
 
       def color_enabled?