Align empty input handling for statement parsing #734

Job	Run time
Gradle Check (windows-latest)	3m 6s
Gradle Check (ubuntu-latest)	2m 51s
Gradle Check (macos-latest)	2m 11s
Maven Verify (windows-latest)	3m 50s
Maven Verify (ubuntu-latest)	2m 16s
Maven Verify (macos-latest)	3m 57s
Build & Deploy Sphinx Docs	-1s
Gradle Publish (Maven Central)	-1s
	18m 9s

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