Dotfiles commit (try to keep under 50 characters)

Multi-line description of commit,
feel free to be detailed.

[Ticket: X]
~
~
".git/COMMIT_EDITMSG" 14L, 297C

.config/fish/functions/_pure_set_default.fish

@@ -0,0 +1,11 @@
+function _pure_set_default \
+    --description 'Set default value for configuration variable' \
+    --argument-names var default
+
+    set is_available_universally (not set --query --universal $var; or test -z $$var; echo $status)
+    set is_available_globally (not set --query --global $var; or test -z $$var; echo $status)
+
+    if test "$is_available_universally" -eq 0 -a $is_available_globally -eq 0
+        set --universal $var "$default"
+    end
+end