btrfs-progs: docs: update btrfs-properties

Signed-off-by: David Sterba <dsterba@suse.com>

Documentation/btrfs-property.asciidoc

@@ -3,7 +3,7 @@ btrfs-property(8)
 
 NAME
 ----
-btrfs-property - get/set/list properties for given btrfs object.
+btrfs-property - get/set/list properties for given filesystem object
 
 SYNOPSIS
 --------
@@ -11,8 +11,9 @@ SYNOPSIS
 
 DESCRIPTION
 -----------
-*btrfs property* is used to get/set/list property for given btrfs object.
-See the description of *get* subcommand for more information about
+*btrfs property* is used to get/set/list property for given filesystem object.
+The object can be an inode (file or directory), subvolume or the whole
+filesystem.  See the description of *get* subcommand for more information about
 both btrfs object and property.
 
 *btrfs property* provides an unified and user-friendly method to tune different
@@ -22,29 +23,30 @@ btrfs properties instead of using the traditional method like `chattr`(1) or
 SUBCOMMAND
 ----------
 *get* [-t <type>] <object> [<name>]::
-Gets a property from a btrfs object.
+get property from a btrfs <object> of given <type>
 +
 A btrfs object, which is set by <object>, can be a btrfs filesystem
-itself, a btrfs subvolume, an inode(file or directory) inside btrfs,
+itself, a btrfs subvolume, an inode (file or directory) inside btrfs,
 or a device on which a btrfs exists.
 +
 The option '-t' can be used to explicitly
 specify what type of object you meant. This is only needed when a
 property could be set for more then one object type.
 +
-Possible types are 's[ubvol]', 'f[ilesystem]', 'i[node]' and 'd[evice]'.
+Possible types are 's[ubvol]', 'f[ilesystem]', 'i[node]' and 'd[evice]', where
+the first lettes is a shortcut.
 +
 Set the name of property by 'name'. If no 'name' is specified,
 all properties for the given object are printed. 'name' is one of
-the followings.
+the following:
 
 ro::::
 read-only flag of subvolume: true or false
 label::::
 label of device
 compression::::
-compression algorithm for an inode, possible values: 'lzo', 'zlib', 'zstd'. To
-disable compression use "" (empty string), 'no' or 'none'.
+compression algorithm set for an inode, possible values: 'lzo', 'zlib', 'zstd'.
+To disable compression use "" (empty string), 'no' or 'none'.
 
 *list* [-t <type>] <object>::
 Lists available properties with their descriptions for the given object.