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<p data-sourcepos="1:1-1:47" dir="auto">I am able to work around
this problem on Debian Buster by adding the line:</p>
<pre class="code highlight js-syntax-highlight plaintext white" lang="plaintext"><code><span id="LC1" class="line" lang="plaintext">
imports.gi.versions.GtkSource = "3.0";</span></code></pre>
<p data-sourcepos="7:1-7:208" dir="auto"><br>
</p>
<p data-sourcepos="7:1-7:208" dir="auto">to the beginning of the
file: <br>
</p>
<p data-sourcepos="7:1-7:208" dir="auto"><code><br>
</code></p>
<p data-sourcepos="7:1-7:208" dir="auto"><code>/usr/share/sushi/js/viewers/text.js</code></p>
<p data-sourcepos="7:1-7:208" dir="auto"><code><br>
</code></p>
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