rustfmt on recent additions

Signed-off-by: Ava Hahn <ava@aidanis.online>

src/stl/decl.rs

@@ -200,7 +200,7 @@ pub fn env_callback(_ast: &Seg, syms: &mut SymTable) -> Result<Ctr, String> {
         match val.value {
             ValueType::VarForm(_) => {
                 println!("  {}: {}", &name, val.value);
-            },
+            }
             _ => functions.push(name.clone()),
         }
     }