Latest round of fixes per RM and AL.  Fix bugs found in man.c.

*** 13,23 ****
  .\"
  .\"
  .\" Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  .\" Copyright 2012 Nexenta Systems, Inc. All rights reserved.
  .\"
! .Dd Sep 25, 2011
  .Dt EQN 5
  .Os
  .Sh NAME
  .Nm eqn
  .Nd eqn language reference for mandoc
--- 13,23 ----
  .\"
  .\"
  .\" Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  .\" Copyright 2012 Nexenta Systems, Inc. All rights reserved.
  .\"
! .Dd Jul 19, 2014
  .Dt EQN 5
  .Os
  .Sh NAME
  .Nm eqn
  .Nd eqn language reference for mandoc
*** 165,175 ****
  Set the default font of subsequent output.
  Its syntax is as follows:
  .Pp
  .D1 gfont Ar font
  .Pp
! In mandoc, this value is discarded.
  .It Cm gsize
  Set the default size of subsequent output.
  Its syntax is as follows:
  .Pp
  .D1 gsize Ar size
--- 165,177 ----
  Set the default font of subsequent output.
  Its syntax is as follows:
  .Pp
  .D1 gfont Ar font
  .Pp
! In
! .Xr mandoc 1 ,
! this value is discarded.
  .It Cm gsize
  Set the default size of subsequent output.
  Its syntax is as follows:
  .Pp
  .D1 gsize Ar size
*** 177,187 ****
  The
  .Ar size
  value should be an integer.
  .It Cm set
  Set an equation mode.
! In mandoc, both arguments are thrown away.
  Its syntax is as follows:
  .Pp
  .D1 set Ar key val
  .Pp
  The
--- 179,191 ----
  The
  .Ar size
  value should be an integer.
  .It Cm set
  Set an equation mode.
! In
! .Xr mandoc 1 ,
! both arguments are thrown away.
  Its syntax is as follows:
  .Pp
  .D1 set Ar key val
  .Pp
  The
*** 203,237 ****
  .Ar key
  is not expanded for replacements.
  This statement is a GNU extension.
  .El
  .Sh COMPATIBILITY
! This section documents the compatibility of mandoc
  .Nm
! and the troff
  .Nm
  implementation (including GNU troff).
  .Pp
  .Bl -dash -compact
  .It
  The text string
  .Sq \e\*q
! is interpreted as a literal quote in troff.
! In mandoc, this is interpreted as a comment.
  .It
! In troff, The circumflex and tilde white-space symbols map to
  fixed-width spaces.
! In mandoc, these characters are synonyms for the space character.
  .It
! The troff implementation of
  .Nm
  allows for equation alignment with the
  .Cm mark
  and
  .Cm lineup
  tokens.
! mandoc discards these tokens.
  The
  .Cm back Ar n ,
  .Cm fwd Ar n ,
  .Cm up Ar n ,
  and
--- 207,253 ----
  .Ar key
  is not expanded for replacements.
  This statement is a GNU extension.
  .El
  .Sh COMPATIBILITY
! This section documents the compatibility of
! .Xr mandoc 1
  .Nm
! and the
! .Xr troff 1
  .Nm
  implementation (including GNU troff).
  .Pp
  .Bl -dash -compact
  .It
  The text string
  .Sq \e\*q
! is interpreted as a literal quote in
! .Xr troff 1 .
! In
! .Xr mandoc 1 ,
! this is interpreted as a comment.
  .It
! In
! .Xr troff 1 ,
! The circumflex and tilde white-space symbols map to
  fixed-width spaces.
! In
! .Xr mandoc 1 ,
! these characters are synonyms for the space character.
  .It
! The
! .Xr troff 1 ,
! implementation of
  .Nm
  allows for equation alignment with the
  .Cm mark
  and
  .Cm lineup
  tokens.
! .Xr mandoc 1
! discards these tokens.
  The
  .Cm back Ar n ,
  .Cm fwd Ar n ,
  .Cm up Ar n ,
  and
*** 238,248 ****
  .Cm down Ar n
  commands are also ignored.
  .El
  .Sh SEE ALSO
  .Xr mandoc 1 ,
! .Xr man 7 ,
  .Xr mandoc_char 5 ,
  .Xr mdoc 5 ,
  .Xr roff 5
  .Rs
  .%A Brian W. Kernighan
--- 254,264 ----
  .Cm down Ar n
  commands are also ignored.
  .El
  .Sh SEE ALSO
  .Xr mandoc 1 ,
! .Xr man 5 ,
  .Xr mandoc_char 5 ,
  .Xr mdoc 5 ,
  .Xr roff 5
  .Rs
  .%A Brian W. Kernighan