Merge #10479: [trivial] Fix comment for ForceSetArg()
Summary:
42a83e5 [trivial] Fix comment for ForceSetArg() (John Newbery)
Tree-SHA512: 596db8b4bb01bca18908e254e5b364d3d4fcb0ea49d7d54314c65106e497efed65a877d80740bff88e090aeb772be1e46d4571ecca9b9263578f3f680f0bd0ce
Backport of Core PR10479
https://github.com/bitcoin/bitcoin/pull/10479/
Test Plan:
make check
Reviewers: deadalnix, Fabien, jasonbcox, O1 Bitcoin ABC, #bitcoin_abc
Reviewed By: Fabien, O1 Bitcoin ABC, #bitcoin_abc
Differential Revision: https://reviews.bitcoinabc.org/D3506