{bash,zsh}rc: add alias for diff colours

Resolves: #136

conf/sway/config.d/autostart-utilities.conf

@@ -1,5 +1,12 @@
 # Autostarting common utilities to my environments
 
+# policykit agent for escalating permissions on-demand such as partition
+# management. LXDE one may not be the best on Wayland, but it's
+# reported working on Fedora mediawriter (FedoraQt/MediaWriter#223)
+#exec --no-startup-id lxpolkit
+# The KDE version as I tend to have it as base image (Fedora)
+exec --no-startup-id /usr/libexec/kf5/polkit-kde-authentication-agent-1
+
 # htop system monitor
 exec --no-startup-id sleep 15 && $term --title=htop htop
 

rc/bashrc

@@ -312,6 +312,9 @@ fi
 
 ## -- End of aliases which are saved from Ubuntu default bashrc. --
 
+# Enable colours for diff when in terminal
+alias diff="diff --color=auto"
+
 # SSHGuard specific
 alias sshguard-show-bans="sshguard4-show-bans && sshguard6-show-bans"
 alias sshguard4-show-bans="sudo iptables -L sshguard --line-numbers"

rc/zshrc

@@ -286,6 +286,9 @@ alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo
 
 ## -- End of aliases which are saved from Ubuntu default bashrc. --
 
+# Enable colours for diff when in terminal
+alias diff="diff --color=auto"
+
 # SSHGuard specific
 alias sshguard-show-bans="sshguard4-show-bans && sshguard6-show-bans"
 alias sshguard4-show-bans="sudo iptables -L sshguard --line-numbers"