Description of problem:
When exporting the report template, the header is added automatically on the code. Once we just copy/paste the code back, we can see some new lines (according to the example below)

Version-Release number of selected component (if applicable):
6.6.z

How reproducible:
100%

Steps to Reproduce:
1. Create the report with the content below (please add the input field 'host' as well to avoid issues.
---
<% load_hosts(search: input('host')).each_record do |host| -%>
<%
      report_row(
          'Server FQND': host.name
      )
-%>
<%  end -%>
<%= report_render %>
---
2. Clicking in preview we can see
---
Server FQND
contenthost1.usersys.redhat.com
contenthost2.usersys.redhat.com
---
3. Now let's save and export via webUI (report template page, then select the dropdown menu list side to Generate button - Export) and the code saved will be as below
---
<% load_hosts(search: input('host')).each_record do |host| -%>
<%#
name: Hosts - complete list
snippet: false
template_inputs:
- name: host
  required: false
  input_type: user
  advanced: false
model: ReportTemplate
%>
<%
      report_row(
        'Server FQND': host.name
      )
-%>
<%  end -%>
<%= report_render %>
---

Actual results:
---


Server FQND
contenthost1.usersys.redhat.com
contenthost2.usersys.redhat.com
---


Expected results:
---
Server FQND
contenthost1.usersys.redhat.com
contenthost2.usersys.redhat.com
---

No new lines on the top. This is caused because of the last line of the header. If we change according to below, new lines will disappear
From
---
<%#
name: Hosts - complete list
snippet: false
template_inputs:
- name: host
  required: false
  input_type: user
  advanced: false
model: ReportTemplate
%>
---

To
---
<%#
name: Hosts - complete list
snippet: false
template_inputs:
- name: host
  required: false
  input_type: user
  advanced: false
model: ReportTemplate
-%>
---

Additional info: