As the title says. Tabs are not 8 spaces from the beginning of the blockquote, but rather 8 spaces from the beginning of the line, making them 4 spaces short.

Current display:

$ lsb_release -a
LSB Version:    :core-4.0-amd64:core-4.0-noarch
Distributor ID: Fedora
Description:    Fedora release 13 (Goddard)
Release:    13
Codename:   Goddard

Should appear as:

$ lsb_release -a
LSB Version:    :core-4.0-amd64:core-4.0-noarch
Distributor ID: Fedora
Description:    Fedora release 13 (Goddard)
Release:        13
Codename:       Goddard