Split Body: a plane lying on a face of the body splits it exactly (#1510) (#1897)

Thanks @SychPL.

crates/kernel/src/lib.rs

@@ -57,6 +57,8 @@ mod issue_1038_tests;
 #[cfg(test)]
 mod issue_1080_tests;
 #[cfg(test)]
+mod issue_1510_tests;
+#[cfg(test)]
 mod issue_324_tests;
 #[cfg(test)]
 mod issue_616_tests;