__fish_man_page: ignore prefixing variable assignments

share/functions/__fish_man_page.fish

@@ -10,8 +10,8 @@ function __fish_man_page
 
     #Skip `sudo` and display then manpage of following command
     while set -q args[2]
-        and test $args[1] = "sudo"
-        set args $args[2..-1]
+        and string match -qr -- '^(sudo|.*=.*)$' $args[1]
+        set -e args[1]
     end
 
     # If there are at least two tokens not starting with "-", the second one might be a subcommand.

share/functions/__fish_prepend_sudo.fish

@@ -1,5 +1,5 @@
 function __fish_prepend_sudo -d "Prepend 'sudo ' to the beginning of the current commandline"
-    set -l cmd (commandline -boc)
+    set -l cmd (commandline -poc)
     if test "$cmd[1]" != "sudo"
         commandline -C 0
         commandline -i "sudo "