buflist: evaluate option buflist.look.sort (closes #1465)

The evaluation allows to use different sort for the bar items, for example with
such value:

    ${if:${bar_item.name}==buflist?number:short_name}

This sorts by number on the first bar item and by short name on the two other
bar items.

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/en/autogen/user/buflist_options.adoc b/doc/en/autogen/user/buflist_options.adoc
index a28f958e9..ce4f8c0d4 100644
--- a/doc/en/autogen/user/buflist_options.adoc
+++ b/doc/en/autogen/user/buflist_options.adoc
@@ -147,7 +147,7 @@
 ** default value: `+""+`
 
 * [[option_buflist.look.sort]] *buflist.look.sort*
-** description: pass:none[comma-separated list of fields to sort buffers; each field is a hdata variable of buffer ("var"), a hdata variable of IRC server ("irc_server.var") or a hdata variable of IRC channel ("irc_channel.var"); char "-" can be used before field to reverse order, char "~" can be used to do a case insensitive comparison; example: "-~short_name" for case insensitive and reverse sort on buffer short name]
+** description: pass:none[comma-separated list of fields to sort buffers; each field is a hdata variable of buffer ("var"), a hdata variable of IRC server ("irc_server.var") or a hdata variable of IRC channel ("irc_channel.var"); char "-" can be used before field to reverse order, char "~" can be used to do a case insensitive comparison; example: "-~short_name" for case insensitive and reverse sort on buffer short name (note: content is evaluated, only the pointer to bar_item can be used, for example "bar_item.name")]
 ** type: string
 ** values: any string
 ** default value: `+"number,-active"+`