fix: changed type of (() T) from (T ...) to (Vector (T ...))

this makes the type of the empty vector consistent with the
runtime behavior and prevents weirdly typed expressions such as
(vector (() Int)) : (Vector (Int ...)).

removed an unused import in case.rs and changed a unused pattern
variable to an underscore in conversion.rs.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/sexp/case.rs b/src/sexp/case.rs
index 0c3d82d..4c2c7ba 100644
--- a/src/sexp/case.rs
+++ b/src/sexp/case.rs
@@ -1,5 +1,5 @@
 
-use crate::sexp::{SExp, SLeaf, SExp::*, SLeaf::*, util::*};
+use crate::sexp::{SExp, SLeaf, SExp::*, SLeaf::*};
 
 impl SExp {
     /**