Made error message format consistent (#591)

Co-authored-by: Max Isom <codetheweb@users.noreply.github.com>

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Error messages consistently show as `🚫 ope: error`
 
 ## [1.7.0] - 2022-03-19
 ### Added

src/utils/error-msg.ts

@@ -1,9 +1,9 @@
 export default (error?: string | Error): string => {
-  let str = '🚫 unknown error';
+  let str = 'unknown error';
 
   if (error) {
     if (typeof error === 'string') {
-      str = `🚫 ${error}`;
+      str = `🚫ope: ${error}`;
     } else if (error instanceof Error) {
       str = `🚫ope: ${error.message}`;
     }