fix(lib): encode all arguments besides the first in `omz_urlencode`

Fixes https://github.com/ohmyzsh/ohmyzsh/commit/140c977a3d82410f48c198596de193d2d6b7b9b5#commitcomment-73688165

lib/functions.zsh

@@ -144,7 +144,7 @@ zmodload zsh/langinfo
 # Returns nonzero if encoding failed.
 #
 # Usage:
-#  omz_urlencode [-r] [-m] [-P] <string>
+#  omz_urlencode [-r] [-m] [-P] <string> [<string> ...]
 #
 #    -r causes reserved characters (;/?:@&=+$,) to be escaped
 #
@@ -156,7 +156,7 @@ function omz_urlencode() {
   local -a opts
   zparseopts -D -E -a opts r m P
 
-  local in_str=$1
+  local in_str="$@"
   local url_str=""
   local spaces_as_plus
   if [[ -z $opts[(r)-P] ]]; then spaces_as_plus=1; fi