fix bug

app/controllers/exercises_controller.rb

@@ -1335,7 +1335,7 @@ class ExercisesController < ApplicationController
   def export_exercise
     @request_url = request.base_url
     @exercise_questions = @exercise.exercise_questions.includes(:exercise_choices).order("question_number ASC")
-    filename = "#{current_user.real_name}_#{@course.name}_#{@exercise.exercise_name}_#{Time.current.strftime('%Y%m%d%H%M%S')}.pdf"
+    filename = "#{@exercise.user.real_name}_#{@exercise.exercise_name}_#{Time.current.strftime('%Y%m%d%H%M%S')}.pdf"
     stylesheets = "#{Rails.root}/app/templates/exercise_export/exercise_export.css"
     render pdf: 'exercise_export/blank_exercise', filename: filename, stylesheets: stylesheets
   end

app/templates/exercise_export/blank_exercise.html.erb

@@ -19,7 +19,7 @@
     </div>
     <div class="mbt20 bgc">
       <div class="ex-scores pd10 text-gray fs13">
-        <p class="clearfix width100">
+        <p class="clearfix width100 inline-block">
           <span class="pull-left">
             <% if @exercise_single_ques_count > 0 %>
         <span class="mr15">单选题<span class="mlr5"><%= @exercise_single_ques_count %></span>题,

app/templates/exercise_export/exercise_user.html.erb

@@ -19,7 +19,7 @@
     </div>
     <div class="mbt20 bgc">
       <div class="ex-scores pd10 text-gray fs13">
-        <p class="clearfix width100">
+        <p class="clearfix width100 inline-block">
           <span class="pull-left">
             <% if @exercise_single_ques_count > 0 %>
         <span class="mr15">单选题<span class="mlr5"><%= @exercise_single_ques_count %></span>题,