hook $template_hook[postbit_user_popup] - problems

[Makc666]

There is hook:
$template_hook[postbit_user_popup]

Example 1:

<template name="test" templatetype="template" date="1182869201" username="Makc666" version="1.0.0">
<![CDATA[
<if condition="$show['pmlink']">
<tr><td class="vbmenu_option">Test Phrase - PostID $post[postid] - Postcount $post[postcount]</td></tr>
</if>
]]>
</template>

<plugin active="1" executionorder="5">
<title>Test (1)</title>
<hookname>postbit_display_complete</hookname>
<phpcode><![CDATA[
eval('$template_hook[postbit_user_popup] = "' . fetch_template('test') . '";');
]]>
</phpcode>
</plugin>

Example 2:

<template name="test" templatetype="template" date="1182869201" username="Makc666" version="1.0.0">
<![CDATA[
<if condition="$show['pmlink']">
<tr><td class="vbmenu_option">Test Phrase - PostID $post[postid] - Postcount $post[postcount]</td></tr>
</if>
]]>
</template>

<plugin active="1" executionorder="5">
<title>Test (1)</title>
<hookname>postbit_display_complete</hookname>
<phpcode><![CDATA[
eval('$template_hook[postbit_user_popup] .= "' . fetch_template('test') . '";');
]]>
</phpcode>
</plugin>

The difference between Example 1 and Example 2 is on line:
eval('$template_hook[postbit_user_popup] = "' . fetch_template('test') . '";');

In Example 1 there is NO . (dot) near =
In Example 2 there is . (dot) near .=

If I use Example 1 then I replace
$template_hook[postbit_user_popup]
with my template
and no one will not be able to use
$template_hook[postbit_user_popup]
once again in another product.

You will say, use Example 2 with . (dot) near .=
as for example in this article is advised:
https://vborg.vbsupport.ru/showthread.php?t=147447

But if I use Example 2 I have some problem...

Look on screenshot.

I don't know what to do...
P.S. I don't want manual template changes.