feat: 恢复 merge cell

lib/tallty_import_export/export_form.rb

@@ -94,13 +94,13 @@ module TalltyImportExport
             end
 
             # 合并仅有一个值的一列中所有格子
-            # value_living_alone_col_index_to_value_count.each_pair do |col_index, count|
-            #   if count == 1
-            #     sheet.merge_cells(
-            #       Axlsx::cell_r(col_index, index) + ':' + Axlsx::cell_r(col_index, index + payload.max_matrix_height - 1)
-            #     )
-            #   end
-            # end
+            value_living_alone_col_index_to_value_count.each_pair do |col_index, count|
+              if count == 1
+                sheet.merge_cells(
+                  Axlsx::cell_r(col_index, index) + ':' + Axlsx::cell_r(col_index, index + payload.max_matrix_height - 1)
+                )
+              end
+            end
 
             index += payload.max_matrix_height
           end