Dollar sign now adds dollar signs around selected text in latex buffers

src/source.cpp

@@ -3609,6 +3609,11 @@ bool Source::View::on_key_press_event_smart_inserts(GdkEventKey *event) {
       left = "/*";
       right = "*/";
     }
+    // Insert $$ around selection
+    else if(event->keyval == GDK_KEY_dollar && language_id == "latex") {
+      left = '$';
+      right = '$';
+    }
     else if(language_id == "markdown" ||
             !is_code_iter(get_buffer()->get_insert()->get_iter()) || !is_code_iter(get_buffer()->get_selection_bound()->get_iter())) {
       // Insert `` around selection