boluor opened a new pull request, #3805:
URL: https://github.com/apache/doris-website/pull/3805
## Summary
Doc page (4.x): \`scalar-functions/string-functions/rtrim.md\` (ZH).
The third example showed:
\`\`\`sql
SELECT RTRIM('hello world \t\n ');
\`\`\`
Whose result is the input minus the trailing space — but the embedded
\`\t\n\` is a *real* tab and newline, so the result block rendered as two
visual rows inside the cell and broke the ASCII grid:
\`\`\`
| hello world
|
\`\`\`
This rewrites the same teaching point using \`LENGTH()\` so the cluster
returns two integers (16 / 15) on a single line, and adds a one-sentence prose
intro that calls out the lesson: *RTRIM only strips ASCII spaces, not tabs or
newlines.*
## Verification
Both LENGTH values confirmed on a single-node Apache Doris 4.1.1 cluster.
## Test plan
- [x] Run the rewritten SQL on a 4.1.1 cluster — result matches \`16 | 15\`.
- [x] Result-block stays a single-row ASCII grid.
- [x] No other change.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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