In "[ \fB\-f\fP\fI ]", the "\fI" will result in the front half "["of
"[ -f ]" doesn't the back half "]"; When you issue the command
"man mkfs.btrfs", you will see the difference.
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
[ \fB\-A\fP\fI alloc-start\fP ]
[ \fB\-b\fP\fI byte-count\fP ]
[ \fB\-d\fP\fI data-profile\fP ]
-[ \fB\-f\fP\fI ]
+[ \fB\-f\fP ]
[ \fB\-l\fP\fI leafsize\fP ]
[ \fB\-L\fP\fI label\fP ]
[ \fB\-m\fP\fI metadata profile\fP ]