[wenh06]

Summary

A language-style pass over the four tutorial pages already on master (quickstart, concepts, tutorial-first-experiment, tutorial-cli-matrix) plus test-files/quickstart.py:

• Replace journalistic formulations with plain declarative sentences: "This page walks you through..." → "This page describes..."; "The accuracy story saturates; the communication story does not" → "Accuracy saturates on this task; the communication cost does not"; "The cast in one table" → "The four objects at a glance"; "the same communication budget buys two extra local iterations" → "at equal communication cost, FedPD performs two more local iterations"; "Two honest observations" → "Two observations"; "land on 180" → "both give 180"; "show up" → "appear"; "ships" → "provides"; "You will see" → declarative.
• Use noun-phrase headings where the drafts had questions or imperatives: "Where do the logs go?" → "Log files"; "Run it" → "Running the matrix"; "Where the results land" → "Results location"; "drives the loop you will see below" → "drives the training loop described below".
• Remove anthropomorphic phrasing: "without any of them knowing about each other" → "algorithms remain independent of the infrastructure"; "That invariant is what makes parallel runs trustworthy" → "This invariant underlies the reproducibility guarantees of parallel execution"; "A matrix of long experiments wants more than one process" → "...benefits from more than one process".
• Reword the zh_CN translations to match, removing calques of the English constructions and aligning with the terminology of the existing translated pages.

Plus one CI fix:

• docs-test-publish.yml: scope the concurrency group so that deploy-capable runs (pushes to doc/master, manual dispatch) share the pages-deploy lock while each pull request gets its own docs-build-<number> group. Previously every run shared one pages group with cancel-in-progress, so pull-request docs builds kept cancelling each other (and being cancelled by master deploys) even though PR builds never reach the publish step.

No technical content changes; all numbers, links and code blocks are unchanged.

Validation

• English and zh_CN docs builds: zero warnings beyond the two pre-existing ones on master (intersphinx fetch flake, optimizers docstring).
• Workflow file parses and the group expression evaluates to pages-deploy for deploy runs and docs-build-<number> for pull requests.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.79%. Comparing base (ca84c9b) to head (52a53f2).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #61   +/-   ##
=======================================
  Coverage   83.79%   83.79%           
=======================================
  Files          55       55           
  Lines        5640     5640           
=======================================
  Hits         4726     4726           
  Misses        914      914           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.