[NFC] BridgeJS: Omit trailing spaces on empty lines in generated JS c… #2120

Job	Run time
check-bridgejs-generated	2m 49s
Build for native target (macos-15, Xcode_16.4)	2m 45s
build-examples	17m 36s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	3m 3s
format	34s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	17m 18s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	12m 43s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 25s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 1s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 47s
deploy-examples	13s
	1h 26m 14s

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