Error when reading configuration file, line 16: duplicate setting name

[DaveJarvis]

Replicate

1. Install fresh copy of Antergos (xfce desktop).
2. Create a regular user as per usual.
3. Log in with said user.
4. Open Settings Manager.
5. Click Window Manager Tweaks.
6. Click Compositor tab.
7. Uncheck Enable display compositing.
8. Click Close.
9. Open a terminal.
10. Type: pacman -Sy compton
11. Type: compton &

Expected Results
No errors.

Actual Results

[ 2019-01-27 22:34:14.116 parse_config_libconfig ERROR ] Error when reading configuration file "$HOME/.config//compton.conf", line 16: duplicate setting name

Additional Details
There is a double slash // in the path to the filename. While this won't affect functionality, it appears to be a slight technical oversight.

The default configuration file has three uncommented references to shadow-exclude:

shadow-exclude = [ "n:e:Notification" ];	# Exclude conditions for shadows.
# shadow-exclude = "n:e:Notification";
shadow-exclude = "n:a:Conky";
shadow-exclude = "synapse";