Why Am I Getting a ‘r’: Command Not Found Error in My Bash Script?

Hey everyone! I'm running into a weird issue with a bash script I wrote for backing up files using rclone. I'm trying to implement logging, but when I run the script, I get this error: 'r': command not found. The confusing part is that I can't find any 'r' characters in my script. The rclone sync works just fine, so I'm not sure why this logging part is giving me trouble. Here's the script I'm using:

```bash
#!/bin/bash
LOG_FILE="/var/log/backup.log"
log() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "${LOG_FILE}"
}
log "Starting the script"
rclone sync -v --create-empty-src-dirs $HOME/Documents Google:Documents
log "Script completed successfully"
```

When I check the result of running the script, I get the following output:

```
barry@barryubuntu:~/sh$ sudo bash backup.sh
[sudo] password for barry:
backup.sh: line 3: $'r': command not found
backup.sh: line 4: syntax error near unexpected token `$'{r''
backup.sh: line 4: `log() {
barry@barryubuntu:~/sh$ cat backup.sh
#!/bin/bash
LOG_FILE="/var/log/backup.log"
log() {
echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "${LOG_FILE}"
}
log "Starting the script"
rclone sync -v --create-empty-src-dirs $HOME/Documents Google:Documents
log "Script completed successfully"
```

I want to get this logging feature working correctly like I had it set up in Windows, so any insights on how to solve this error would be greatly appreciated! Thanks!