Add 'shellcheck=bash' and editor hints to bash config/aliases

.bash_aliases/all

@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 # vim: set ft=bash :
 
 # Alias aliases

.bash_aliases/dualboot

@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 # vim: set ft=bash :
 
 reboot-to-windows ()

.bash_aliases/hosts/flex-arch

@@ -1,3 +1,4 @@
+# shellcheck shell=bash
 # vim: set ft=bash :
 
 source "$HOME/.bash_aliases/dualboot"