docs: fix duplicated words in host_stub_visibility and permutation_iterator comments

[vip892766gma]

Two one-line typo fixes for duplicated words:

• docs/cccl/development/visibility/host_stub_visibility.rst — "but the the compiler" → "but the compiler"
• libcudacxx/include/cuda/__iterator/permutation_iterator.h — "The iterator to to index from" → "The iterator to index from"

No code/behavior change.

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• docs/cccl/development/visibility/host_stub_visibility.rst

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• docs/cccl/development/visibility/host_stub_visibility.rst

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📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Fixed duplicate wording in a developer-facing guide to improve clarity.
  • Corrected a duplicate word in constructor parameter documentation to clarify API comments.

suggestion: ## Walkthrough

Two trivial documentation corrections: a duplicated word "the the" becomes "the" in host stub visibility documentation, and a duplicate word is removed from the permutation_iterator constructor @param documentation comment. No code, API, or structural changes.

suggestion: ## Changes

Documentation and Comment Typo Corrections

Layer / File(s)	Summary
host_stub_visibility documentation typo docs/cccl/development/visibility/host_stub_visibility.rst	Duplicated word "the the compiler" is corrected to "the compiler" in documentation describing CUDA fatbinaries.
permutation_iterator @param documentation typo libcudacxx/include/cuda/__iterator/permutation_iterator.h	Constructor __iter parameter documentation comment has a duplicate word removed.

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Actionable comments posted: 1

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Reviewing files that changed from the base of the PR and between 5d79bc2 and 112f06f.

📒 Files selected for processing (2)

• docs/cccl/development/visibility/host_stub_visibility.rst
• libcudacxx/include/cuda/__iterator/permutation_iterator.h

[Jacobfaib]

/ok to test

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/ok to test

@Jacobfaib, there was an error processing your request: E1

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[Jacobfaib]

/ok to test 2f95666

[Jacobfaib]

@vip892766gma thanks for the fixes!

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