This file is indexed.

/usr/share/help/C/gnome-help/net-default-email.page is in gnome-user-docs 3.28.1-0ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
<page xmlns="http://projectmallard.org/1.0/"
      xmlns:its="http://www.w3.org/2005/11/its"
      type="topic" style="task"
      id="net-default-email">

  <info>
    <link type="guide" xref="net-email"/>

    <revision pkgversion="3.7.1" version="0.2" date="2012-11-16" status="outdated"/>
    <revision pkgversion="3.10" date="2013-10-30" status="review"/>
    <revision pkgversion="3.18" date="2015-09-28" status="final"/>

    <credit type="author">
      <name>Phil Bull</name>
      <email>philbull@gmail.com</email>
    </credit>
    <credit type="editor">
      <name>Michael Hill</name>
      <email>mdhillca@gmail.com</email>
    </credit>
    <credit type="editor">
      <name>Ekaterina Gerasimova</name>
      <email>kittykat@gmail.com</email>
    </credit>

    <include href="legal.xml" xmlns="http://www.w3.org/2001/XInclude"/>

    <desc>Change the default email client by going to <gui>Details</gui> in <gui>Settings</gui>.</desc>
  </info>

  <title>Change which mail application is used to write emails</title>

  <p>When you click a button or link to send a new email (for example, in your
  word processing application), your default mail application will open up with
  a blank message, ready for you to write. However, if you have more than one
  mail application installed, the wrong mail application might open up. You
  can fix this by changing which one is the default email application:</p>

  <steps>
    <item>
      <p>Open the <gui xref="shell-introduction#activities">Activities</gui> overview and
      start typing <gui>Details</gui>.</p>
    </item>
    <item>
      <p>Click on <gui>Details</gui> to open the panel.</p>
    </item>
    <item>
      <p>Choose <gui>Default Applications</gui> from the list on the left side
      of the window.</p>
    </item>
    <item>
      <p>Choose which email client you would like to be used by default by
      changing the <gui>Mail</gui> option.</p>
    </item>
  </steps>

</page>