local: clarify what --local-fatal-if-no-space catches

The flag applies to out of space errors while writing and while creating
files or directories, not only while writing. Describe those operations
without naming ENOSPC, which is a Unix error that Windows never reports, so
the help is accurate on every platform.

backend/local/local.go

@@ -311,10 +311,10 @@ set this flag.`,
 				Name: "fatal_if_no_space",
 				Help: `Make out-of-space errors fatal during transfers.
 
-When enabled, an ENOSPC error during a write returns a fatal error so
-that rclone aborts rather than retrying the operation. Useful for
-backup scripts that should halt loudly on a full disk rather than spin
-retrying.`,
+When enabled, an out of space error while writing, creating a directory,
+or creating a file returns a fatal error so that rclone aborts rather
+than retrying the operation. Useful for backup scripts that should halt
+loudly on a full disk rather than spin retrying.`,
 				Default:  false,
 				Advanced: true,
 			},