Auto merge of #66109 - pietroalbini:rollup-2npidna, r=pietroalbini

Auto merge of #66109 - pietroalbini:rollup-2npidna, r=pietroalbini

Rollup of 10 pull requests

Successful merges:

 - #65136 (Update codegen option documentation.)
 - #65574 (docs: improve disclaimer regarding LinkedList)
 - #65720 (Add FFI bindings for LLVM's Module::getInstructionCount())
 - #65905 ([doc] fixes for unix/vxworks `OpenOptionsExt::mode`)
 - #65962 (Fix logic in example.)
 - #66019 (Improved std::iter::Chain documentation)
 - #66038 (doc(str): show example of chars().count() under len())
 - #66042 (Suggest correct code when encountering an incorrect trait bound referencing the current trait)
 - #66073 (Do not needlessly write-lock)
 - #66096 (Add a failing UI test for multiple loops of all kinds in a `const`)

Failed merges:

r? @ghost