Replace begin .. end with ( .. )

src/oboy.ml

@@ -16,16 +16,15 @@ let rec run (cpu: Cpu.t) (mem: Memory.t) (screen: Screen.t) =
   printf "start %f\n" start;
 
   let rec run_for cpu (mem: Memory.t) cycles_remaining =
-    if cycles_remaining > 0 then
-    begin
+    if cycles_remaining > 0 then (
       printf "\n";
       let inst, cycles = Cpu.run cpu mem.map in
       printf "[Instruction] %s\n" inst;
 
       Memory.update_timers mem cycles;
-      
+
       run_for cpu mem (cycles_remaining - cycles)
-    end
+    )
   in
   run_for cpu mem cycles_per_frame;
 
@@ -60,12 +59,11 @@ let power_up cartridge =
 
 
 let () =
-  if Array.length Sys.argv < 2 then
-  begin
+  if Array.length Sys.argv < 2 then (
     prerr_endline "Please specify a ROM.";
     eprintf "Usage: %s path/to/rom\n" Sys.argv.(0);
     exit 1;
-  end;
+  );
 
   let cartridge = Cartridge.read_cartridge Sys.argv.(1) in
   match cartridge with