proc/meminfo: fix output alignment

proc/meminfo: fix output alignment

Patch series "Fixes for THP in page cache", v2.

This patch (of 5):

Add extra space for FileHugePages and FilePmdMapped, so the output is
aligned with other rows.

Link: http://lkml.kernel.org/r/[email protected]
Fixes: 60fbf0ab5da1 ("mm,thp: stats for file backed THP")
Signed-off-by: Kirill A. Shutemov <[email protected]>
Signed-off-by: Song Liu <[email protected]>
Tested-by: Song Liu <[email protected]>
Acked-by: Yang Shi <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Srikar Dronamraju <[email protected]>
Cc: William Kucharski <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>