build

Enclose dangling else in braces and fix -Wmisleading-indentation #1478

Job	Run time
ruby-versions / Generate Ruby versions	3s
build (2.6 / ubuntu-latest)	31s
build (2.6 / macos-latest)	37s
build (2.6 / windows-latest)	3m 5s
build (2.7 / ubuntu-latest)	27s
build (2.7 / macos-latest)	31s
build (2.7 / windows-latest)	4m 3s
build (3.0 / ubuntu-latest)	14s
build (3.0 / macos-latest)	13s
build (3.0 / windows-latest)	2m 57s
build (3.1 / ubuntu-latest)	15s
build (3.1 / macos-latest)	12s
build (3.1 / windows-latest)	1m 54s
build (3.2 / ubuntu-latest)	17s
build (3.2 / macos-latest)	14s
build (3.2 / windows-latest)	1m 46s
build (3.3 / ubuntu-latest)	16s
build (3.3 / macos-latest)	19s
build (3.3 / windows-latest)	2m 54s
build (3.4 / ubuntu-latest)	18s
build (3.4 / macos-latest)	19s
build (3.4 / windows-latest)	3m 37s
build (head / ubuntu-latest)	19s
build (head / macos-latest)	17s
build (truffleruby-head / ubuntu-latest)	47s
build (truffleruby-head / macos-latest)	52s
build (mingw / windows-latest)	1m 51s
build (mswin / windows-2019)	1m 52s
	31m 0s

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