A few errors in the email widget

[streetturtle]

Discussed in #358

^{Originally posted by Hamster-of-power June 25, 2022}
Hi,
I am new to Github, so sorry, if this is not the "correct" way of reporting. There were a few errors that I would like to point out:

1. It says
   email_icon:set_image(path_to_icons .. "/mail-mark-new.png")
   That, png does not exist. Maybe try
   email_icon:set_image(path_to_icons .. "/mail-message-new.png")?

2. In the show_emails()function, you are using python. However, it requires python3. For python3, however, the print function of
   /home//.config/awesome/email-widget/read_unread_emails.py
   needs brackets in two places:
   line 10
   print("No messages found!")
   and line 16
   print("ERROR getting message", num)

Great program btw.

[Ryuno-Ki]

Well, yes and no.

awesome-wm-widgets/email-widget/read_unread_emails.py

Line 1 in 5358c40

#!/usr/bin/python

says Python. Depending on the OS that could be very well Python2 (thinking of Debian), even though it reached EOL.

I'd recommend to update the Shebang to python3 while fixing this.

Just from reading I can see some non-idiomatic bits as well. You might want to stop dealing with them entirely by using black or blue.