docs(pick): clarify how default_choose() works for different items

Author: echasnovski

doc/mini-pick.txt

@@ -1012,9 +1012,9 @@ Parameters ~
 Default choose
 
 Choose item. Logic follows the rules in |MiniPick-source.items-common|:
-- File and directory are called with |:edit| in the target window, possibly
-  followed by setting cursor at the start of line/position/region.
-- Buffer is set as current in target window.
+- File uses |bufadd()| and sets cursor at the start of line/position/region.
+- Buffer is set as current in target window and sets cursor similarly.
+- Directory is called with |:edit| in the target window.
 - Others have the output of |vim.inspect()| printed in Command line.
 
 Implements default value for |MiniPick-source.choose|.

lua/mini/pick.lua

@@ -1134,9 +1134,9 @@ end
 --- Default choose
 ---
 --- Choose item. Logic follows the rules in |MiniPick-source.items-common|:
---- - File and directory are called with |:edit| in the target window, possibly
----   followed by setting cursor at the start of line/position/region.
---- - Buffer is set as current in target window.
+--- - File uses |bufadd()| and sets cursor at the start of line/position/region.
+--- - Buffer is set as current in target window and sets cursor similarly.
+--- - Directory is called with |:edit| in the target window.
 --- - Others have the output of |vim.inspect()| printed in Command line.
 ---
 --- Implements default value for |MiniPick-source.choose|.