Improved indentation when inserting snippets

src/source_base.cpp

@@ -1669,6 +1669,9 @@ void Source::BaseView::insert_snippet(Gtk::TextIter iter, const std::string &sni
   };
 
   std::function<void(bool)> parse_snippet = [&](bool stop_at_curly_end) {
+    auto tabs_end_iter = get_tabs_end_iter();
+    auto prefix_tabs = get_line_before(iter < tabs_end_iter ? iter : tabs_end_iter);
+
     int number;
     for(; i < snippet.size() && !(stop_at_curly_end && snippet[i] == '}');) {
       if(snippet[i] == '\\') {
@@ -1723,6 +1726,10 @@ void Source::BaseView::insert_snippet(Gtk::TextIter iter, const std::string &sni
         else if(parse_variable() == ParseVariableResult::not_found)
           insert += '$';
       }
+      else if(snippet[i] == '\n') {
+        insert += '\n' + prefix_tabs;
+        ++i;
+      }
       else {
         insert += snippet[i];
         ++i;