diff --git a/compilers/rustyc/optimizer/src/main.rs b/compilers/rustyc/optimizer/src/main.rs
index 07baa60d..097f7915 100644
--- a/compilers/rustyc/optimizer/src/main.rs
+++ b/compilers/rustyc/optimizer/src/main.rs
@@ -165,7 +165,6 @@ fn main() {
     // anaylsiser_example();
 }
 
-
 pub fn create_licm_graph_simple_example_from_cmu() -> Function {
     let mut function = Function::new(String::from("test_fun"));
     // create blocks
@@ -195,8 +194,12 @@ pub fn create_licm_graph_simple_example_from_cmu() -> Function {
     let a_inner = function.build_add_inst(b, c);
     let e = function.add_register(IrValueType::I16);
     function.insert_inst_to_block_front(
-        &b2, 
-        ir::instructions::InstructionData::Phi { opcode: ir::instructions::OpCode::Phi, dst: e , from: vec![(b2, a_inner), (b1, a)] }
+        &b2,
+        ir::instructions::InstructionData::Phi {
+            opcode: ir::instructions::OpCode::Phi,
+            dst: e,
+            from: vec![(b2, a_inner), (b1, a)],
+        },
     );
     // exit
     function.switch_to_block(b3);
@@ -256,4 +259,4 @@ pub fn create_licm_graph_example_from_cmu() -> Function {
     function.build_ret_inst(None);
 
     function
-}
\ No newline at end of file
+}
diff --git a/compilers/rustyc/optimizer/tests/build_ir_graph.rs b/compilers/rustyc/optimizer/tests/build_ir_graph.rs
index 9c11d950..21ba28ca 100644
--- a/compilers/rustyc/optimizer/tests/build_ir_graph.rs
+++ b/compilers/rustyc/optimizer/tests/build_ir_graph.rs
@@ -262,8 +262,12 @@ pub fn create_licm_graph_simple_example_from_cmu() -> Function {
     let a_inner = function.build_add_inst(b, c);
     let e = function.add_register(IrValueType::I16);
     function.insert_inst_to_block_front(
-        &b2, 
-        ir::instructions::InstructionData::Phi { opcode: ir::instructions::OpCode::Phi, dst: e , from: vec![(b2, a_inner), (b1, a)] }
+        &b2,
+        ir::instructions::InstructionData::Phi {
+            opcode: ir::instructions::OpCode::Phi,
+            dst: e,
+            from: vec![(b2, a_inner), (b1, a)],
+        },
     );
     // exit
     function.switch_to_block(b3);
diff --git a/compilers/rustyc/optimizer/tests/ir_optimizer_test_runner.rs b/compilers/rustyc/optimizer/tests/ir_optimizer_test_runner.rs
index 56251b89..ce37dcad 100644
--- a/compilers/rustyc/optimizer/tests/ir_optimizer_test_runner.rs
+++ b/compilers/rustyc/optimizer/tests/ir_optimizer_test_runner.rs
@@ -132,21 +132,19 @@ generate_pass_cases!(
         let after = fun.print_to_string();
         (before, table, after)
     }),
-    (
-        test_licm_pass_cmu_example_2, "./licm/cmu_example_2", || {
-            let mut fun = create_licm_graph_simple_example_from_cmu();
-            let before = fun.print_to_string();
-            let mut dom = DomAnaylsier::new();
-            let dom_table = dom.anaylsis(&fun);
-            let mut use_def = UseDefAnaylsier::new();
-            let use_def_table = use_def.anaylsis(&fun);
-            let mut pass = LICMPass::new(&use_def_table, &dom_table);
-            pass.process(&mut fun);
-            let table = pass.debugger(&fun);
-            let after = fun.print_to_string();
-            (before, table, after)
-        }
-    )
+    (test_licm_pass_cmu_example_2, "./licm/cmu_example_2", || {
+        let mut fun = create_licm_graph_simple_example_from_cmu();
+        let before = fun.print_to_string();
+        let mut dom = DomAnaylsier::new();
+        let dom_table = dom.anaylsis(&fun);
+        let mut use_def = UseDefAnaylsier::new();
+        let use_def_table = use_def.anaylsis(&fun);
+        let mut pass = LICMPass::new(&use_def_table, &dom_table);
+        pass.process(&mut fun);
+        let table = pass.debugger(&fun);
+        let after = fun.print_to_string();
+        (before, table, after)
+    })
 );
 
 #[test]