[Chapel Merge] Adjust the wording of `unsafeAssign()` method docs

Branch: refs/heads/main
Revision: b558a9e
Author: dlongnecke-cray
Link: Adjust the wording of `unsafeAssign()` method docs by dlongnecke-cray · Pull Request #19524 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #19524 from dlongnecke-cray/domain-unsafe-assign-docs

Adjust the wording of unsafeAssign() method docs (#19524)

Reword the docs for the unsafeAssign() method as well as the
description of the unsafeAssignManager type and its
initialize() method.

While here, also "no doc" the isClassReferenceNil method and
mark the checks method as returning param.

Reviewed by @vasslitvinov. Thanks!

Signed-off-by: David Longnecker dlongnecke-cray@users.noreply.github.com

Modified Files:
M modules/internal/ChapelDomain.chpl

Compare: https://github.com/chapel-lang/chapel/compare/28c0a2476a6d...b558a9ef18f8