[gnome-maps] transitLegRow: Properly escape transit leg headsigns

[Marcus Lundblad <mlundblad src gnome org>]

commit da62ad070f897c7b7b8a94822b6390e3acbd5f1f
Author: Marcus Lundblad <ml update uu se>
Date:   Fri May 12 23:26:17 2017 +0200

    transitLegRow: Properly escape transit leg headsigns
    
    Trivial: Escape the headsign label text, since we pass it to a <span/>-
    enclosed label text.

 src/transitLegRow.js |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/transitLegRow.js b/src/transitLegRow.js
index b69129b..31be422 100644
--- a/src/transitLegRow.js
+++ b/src/transitLegRow.js
@@ -124,8 +124,8 @@ const TransitLegRow = new Lang.Class({
                                                 ellipsize: Pango.EllipsizeMode.END,
                                                 halign: Gtk.Align.START });
             if (this._leg.transit && this._leg.headsign) {
-                headsignLabel.label =
-                    '<span size="small">%s</span>'.format(this._leg.headsign);
+                let label = GLib.markup_escape_text(this._leg.headsign, -1);
+                headsignLabel.label = '<span size="small">%s</span>'.format(label);
             } else if (!this._leg.transit) {
                 let label =
                     /* Translators: this is a format string indicating walking a certain