[fractal] Message Widget: Don't highlight matching brackets

[Alejandro Domínguez <aledomu src gnome org>]

commit 2276b85228e2e0f0da37c6d4122dc6ff67674df6
Author: Maximiliano Sandoval R <msandova protonmail com>
Date:   Thu Oct 22 13:14:37 2020 +0200

    Message Widget: Don't highlight matching brackets

 fractal-gtk/src/widgets/message.rs | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/fractal-gtk/src/widgets/message.rs b/fractal-gtk/src/widgets/message.rs
index e5fbd6a4..db66185b 100644
--- a/fractal-gtk/src/widgets/message.rs
+++ b/fractal-gtk/src/widgets/message.rs
@@ -18,6 +18,7 @@ use gtk::{prelude::*, ButtonExt, ContainerExt, LabelExt, Overlay, WidgetExt};
 use html2pango::block::{HtmlBlock, markup_html};
 use itertools::Itertools;
 use matrix_sdk::Client as MatrixClient;
+use sourceview4::BufferExt;
 use std::cmp::max;
 use std::rc::Rc;
 
@@ -571,6 +572,7 @@ fn render_html_block(block: &HtmlBlock) -> gtk::Widget {
         }
         HtmlBlock::Code(s) => {
             let buffer = sourceview4::Buffer::new::<gtk::TextTagTable>(None);
+            buffer.set_highlight_matching_brackets(false);
             buffer.set_text(&s);
             let view = sourceview4::View::with_buffer(&buffer);
             view.set_editable(false);