[groff] om.tmac: Is ".if r A .nr A \nA" meaningful

[Bjarni Ingi Gislason]

  In the file "contrib/mom/om.tmac" there are two lines of type

.if r A .nr A \nA

after ".MAC HDRFTR_RULE_GAP END"

namely

.       if r #FOOTER_RULE_GAP .nr #FOOTER_RULE_GAP \\n[#FOOTER_RULE_GAP]

  and

.       if r #HEADER_RULE_GAP .nr #HEADER_RULE_GAP \\n[#HEADER_RULE_GAP]

  If these do have a meaning, then this must be documented or something
is wrong.

  The whole macro is

.MAC HDRFTR_RULE_GAP END
.    nr #HDRFTR_RULE_GAP (\\$1)
.    if '\\$0'HEADER_RULE_GAP' \{\
.       nr #HEADER_RULE_GAP \\n[#HDRFTR_RULE_GAP]
.       if r #FOOTER_RULE_GAP .nr #FOOTER_RULE_GAP \\n[#FOOTER_RULE_GAP]
.    \}
.    if '\\$0'FOOTER_RULE_GAP' \{\
.       nr #FOOTER_RULE_GAP \\n[#HDRFTR_RULE_GAP]
.       if r #HEADER_RULE_GAP .nr #HEADER_RULE_GAP \\n[#HEADER_RULE_GAP]
.    \}
.END

  with

.ALIAS  FOOTER_RULE_GAP         HDRFTR_RULE_GAP
.ALIAS  HEADER_RULE_GAP         HDRFTR_RULE_GAP


-- 
Bjarni I. Gislason