The Postscript, PDF and HTML formats of RFC-2188 are not the authoritative RFC. The formal, authoritative publication of RFC-2188 is the text format published at the online RFC library.
The author has made every effort to ensure that the Postscript, PDF and HTML formats contain the exact same text as the original. If there are any discrepancies between the Postscript, PDF, HTML formats and the original text version, the original text version is always authoritative.