Fish shell "." is deprecated in favor of "source"

Per [the fish documentation for "source"](file:///usr/local/Cellar/fish/2.2.0/share/doc/fish/commands.html#source) - ". (a single period) is an alias for the source command. The use of . is deprecated in favour of source, and . will be removed in a future version of fish."

libexec/rbenv-init

@@ -70,7 +70,7 @@ if [ -z "$print" ]; then
     echo
     case "$shell" in
     fish )
-      echo 'status --is-interactive; and . (rbenv init -|psub)'
+      echo 'status --is-interactive; and source (rbenv init -|psub)'
       ;;
     * )
       echo 'eval "$(rbenv init -)"'