repl: add spaces to load/save messages

PR-URL: #20536
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

lib/repl.js

@@ -1429,9 +1429,9 @@ function defineDefaultCommands(repl) {
     action: function(file) {
       try {
         fs.writeFileSync(file, this.lines.join('\n') + '\n');
-        this.outputStream.write('Session saved to:' + file + '\n');
+        this.outputStream.write('Session saved to: ' + file + '\n');
       } catch (e) {
-        this.outputStream.write('Failed to save:' + file + '\n');
+        this.outputStream.write('Failed to save: ' + file + '\n');
       }
       this.displayPrompt();
     }
@@ -1453,11 +1453,11 @@ function defineDefaultCommands(repl) {
           _turnOffEditorMode(this);
           this.write('\n');
         } else {
-          this.outputStream.write('Failed to load:' + file +
+          this.outputStream.write('Failed to load: ' + file +
                                   ' is not a valid file\n');
         }
       } catch (e) {
-        this.outputStream.write('Failed to load:' + file + '\n');
+        this.outputStream.write('Failed to load: ' + file + '\n');
       }
       this.displayPrompt();
     }