feat: change REPL indicators (#263)

src/repl/prompt.rs

@@ -39,9 +39,9 @@ impl Prompt for ReplPrompt {
 
     fn render_prompt_indicator(&self, _prompt_mode: reedline::PromptEditMode) -> Cow<str> {
         if self.config.read().session.is_some() {
-            Cow::Borrowed("）")
+            Cow::Borrowed(") ")
         } else {
-            Cow::Borrowed("〉")
+            Cow::Borrowed("> ")
         }
     }