bug#28735: say "by the current user"

[積丹尼 Dan Jacobson]

On (info "(coreutils) Access permission tests")
don't say
‘-r FILE’
     True if FILE exists and read permission is granted.

‘-w FILE’
     True if FILE exists and write permission is granted.

‘-x FILE’
     True if FILE exists and execute permission is granted (or search
     permission, if it is a directory).

Say ... "is X-able by the current user."
Same on the ls man page.

Else you are not being clear if this is just testing if a certain bit
has been set, vs. something to do with the current user vs. the file owner!