Slight improvement when tabbing from empty line

src/source.cc

@@ -2334,7 +2334,8 @@ bool Source::View::on_key_press_event_bracket_language(GdkEventKey *key) {
     else if(iter.starts_line() && iter.ends_line() && !get_buffer()->get_has_selection()) {
       // Indenting after for instance: if(...)\n...;\n
       auto condition_iter = iter;
-      condition_iter.backward_char();
+      while(condition_iter.starts_line() && condition_iter.backward_char()) {
+      }
       condition_iter = find_non_whitespace_code_iter_backward(condition_iter);
       if(*condition_iter == ';' && condition_iter.get_line() > 0 && is_code_iter(condition_iter)) {
         auto start_iter = get_start_of_expression(condition_iter);

tests/source_key_test.cc

@@ -2104,6 +2104,22 @@ int main() {
       iter.forward_to_line_end();
       g_assert(buffer->get_insert()->get_iter() == iter);
     }
+    {
+      buffer->set_text("    if(true)\n"
+                       "      ;\n"
+                       "\n"
+                       "\n");
+      auto iter = buffer->get_iter_at_line(3);
+      buffer->place_cursor(iter);
+      view.on_key_press_event(&event);
+      g_assert(buffer->get_text() == "    if(true)\n"
+                                     "      ;\n"
+                                     "\n"
+                                     "    \n");
+      iter = buffer->get_iter_at_line(3);
+      iter.forward_to_line_end();
+      g_assert(buffer->get_insert()->get_iter() == iter);
+    }
     {
       view.set_tab_char_and_size('\t', 1);
       buffer->set_text("\t\tif(true)\n"