Add docstring in trust-region tools.

[tmigot]

• Review the docstring in trust-region tools.
• Allow max_radius ≥ initial_radius
• Fix #185

[codecov[bot]]

Codecov Report

Base: 96.68% // Head: 96.70% // Increases project coverage by +0.01% :tada:

Coverage data is based on head (6be1050) compared to base (96b16a4). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #186 +/- ## ========================================== + Coverage 96.68% 96.70% +0.01% ========================================== Files 7 8 +1 Lines 181 182 +1 ========================================== + Hits 175 176 +1 Misses 6 6 ``` | [Impacted Files](https://codecov.io/gh/JuliaSmoothOptimizers/SolverTools.jl/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers) | Coverage Δ | | |---|---|---| | [src/trust-region/basic-trust-region.jl](https://codecov.io/gh/JuliaSmoothOptimizers/SolverTools.jl/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL3RydXN0LXJlZ2lvbi9iYXNpYy10cnVzdC1yZWdpb24uamw=) | `100.00% <100.00%> (ø)` | | | [src/trust-region/tron-trust-region.jl](https://codecov.io/gh/JuliaSmoothOptimizers/SolverTools.jl/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL3RydXN0LXJlZ2lvbi90cm9uLXRydXN0LXJlZ2lvbi5qbA==) | `100.00% <100.00%> (ø)` | | | [src/trust-region/trust-region.jl](https://codecov.io/gh/JuliaSmoothOptimizers/SolverTools.jl/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL3RydXN0LXJlZ2lvbi90cnVzdC1yZWdpb24uamw=) | `95.23% <100.00%> (+0.79%)` | :arrow_up: | | [src/SolverTools.jl](https://codecov.io/gh/JuliaSmoothOptimizers/SolverTools.jl/pull/186?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL1NvbHZlclRvb2xzLmps) | `100.00% <0.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers)

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[github-actions[bot]]

Package name	latest	stable
DCISolver.jl
JSOSolvers.jl
Percival.jl

[abelsiqueira]

Thanks. Can you make a new release for this? You can merge directly.