Adds set block assignments in cn docs
Adds set block assignments in cn docs

mozilla/nunjucks,kevinschaul/nunjucks,internalfx/nunjucks,mozilla/nunjucks,devoidfury/nunjucks,internalfx/nunjucks,kevinschaul/nunjucks,oddbird/nunjucks,devoidfury/nunjucks,oddbird/nunjucks,mozilla/nunjucks,internalfx/nunjucks,devoidfury/nunjucks,internalfx/nunjucks,oddbird/nunjucks,kevinschaul/nunjucks,kevinschaul/nunjucks,oddbird/nunjucks