Revert a part of "[DOC] refined" [ci skip]
This reverts commit 478716f49a19cdd86f629c6a0673c1ff53630c96 partially -- "Removed unnecessary parentheses" part -- because of a lambda, see 9e25eb308d4fae9a10e120c2b4601916cc38336c.
Added by nobu (Nobuyoshi Nakada) almost 5 years ago
Revert a part of "[DOC] refined" [ci skip]
This reverts commit 478716f49a19cdd86f629c6a0673c1ff53630c96
partially -- "Removed unnecessary parentheses" part -- because of
a lambda, see 9e25eb308d4fae9a10e120c2b4601916cc38336c.