copier sets trim_blocks, which strips the first newline after a block
tag. The PostgreSQL credentials snippet ended a line with {% endraw %},
so the trailing newline was eaten and the closing ``` fence was pulled
onto the psql command line, breaking the code block in most Markdown
renderers.

Use the +%} whitespace control to disable trim_blocks for that single
tag, keeping the fence on its own line. The second, similar snippet is
unaffected because its {% endraw %} sits mid-line.

Found via GitLab Duo on
gitlab-org/auth/glaz!36 (comment 3465637168)

AI-assisted: Zed Agent (Claude Opus 4.8)

chore(deps): update dependency gitlab-com/gl-infra/platform/runway/fairway to v1.32.1

See merge request !768

fix(caproni): keep README code fence on own line

See merge request !764