Added Ingo's TODO file.

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+
+Before trying to fix anything from this list,
+check against -current mandoc from OpenBSD CVS.
+Sometimes, i'm a bit behind marking entries FIXED.
+
+In general, i keep FIXED entries for some time
+and remove them when they turn into old news.
+
+************************************************************************
+* missing features
+************************************************************************
+
+- explicit blocks with missing end macro should be implicitely closed
+  at the end of the enclosing block, e.g. .Bl It (El) Sh
+  reminded by stsp@  in net/pptp pptp.8  Fri, 23 Apr 2010 20:32:39 +0200
+
+- .Bl -column .Xo support is missing
+  ultimate goal:
+  restore .Xr and .Dv to
+  lib/libc/compat-43/sigvec.3
+  lib/libc/gen/signal.3
+  lib/libc/sys/sigaction.2
+
+- .Bk / .Ek is broken, e.g.
+  $ man ssh
+  [...]
+  ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec] [-D
+  [bind_address:]port] [-e escape_char] [-F configfile] [-I pkcs11]
+  reminded by Ludo Smissaert  Mon, 10 May 2010 12:15:11 +0200
+  also reported by jmc@ earlier
+
+- man(7) .TH should recognize "3p" as a section number
+  found in usr.bin/pkg_add OpenBSD::Getopt
+
+- implement \\
+  in plain text, identical to \e
+  as a macro argument, identical to \ i.e. escaping the next character
+  We do not have macro definitions yet; if we implement them,
+  \\ must behave in a macro def like in a macro argument,
+  and when using the macro, it must expand yet again.
+
+- look at bsd.lv tbl(1)
+  from kristaps@  Fri, 11 Sep 2009 17:10:53 +0200
+
+- look at pages generated from reStructeredText, e.g. devel/mercurial hg(1)
+  These are a weird mixture of man(7) and custom autogenerated low-level
+  roff stuff.  Figure out to what extent we can cope.
+  noted by stsp@  Sat, 24 Apr 2010 09:17:55 +0200
+  reminded by nicm@  Mon, 3 May 2010 09:52:41 +0100
+
+
+- FIXED OpenBSD term.h 1.16 term.c 1.30 mdoc_term.c 1.75 schwarze 23.4.10
+  handle tab characters outside literal context, e.g. usb(4)
+  reported by jmc@  Mon, 19 Apr 2010 07:42:12 +0100
+
+- FIXED OpenBSD man.h 1.15 libman.h 1.16 man_hash.c 1.9 
+  man.c 1.25 man_macro.c 1.15 man_validate.c 1.19 man_action.c 1.15 
+  man_term.c 1.28 man_html.c 1.9 schwarze 25.4.
+  implement .if .ie .el
+  noticed by espie@  Fri, 23 Apr 2010 17:10:35 +0200
+
+- FIXED bsd.lv libman.h 1.31 libmdoc.h 1.34 man.c 1.60 mdoc.c 1.123
+        kristaps@ 8.4.10
+  FIXED OpenBSD libman.h 1.17 libmdoc.h 1.28 man.c 1.26 mdoc.c 1.45
+        schwarze@ 8.5.10
+  groff handles \." just like .\"
+  Thus, mandoc must also ignore such lines.
+  For an example, see tr(1).
+  reported by Claus Assmann Mon, 5 Apr 2010 08:46:30 -0700
+
+
+************************************************************************
+* formatting issues: ugly output
+************************************************************************
+
+- outside list context, text following .Sm off
+  seems to follow without a blank (TERM_NOBLANK reset late?) e.g.
+        .Sm off
+        .Xo
+        .Op Ar bind_address No /
+        .Ar port
+        .Xc
+        .Sm on
+        or by enclosing
+  reported by jmc Tue, 13 Apr 2010 08:48:14 +0100
+
+- do not break the line after "--", it's probably a long option
+  reminded by stsp in net/pptp pptp.8  Fri, 23 Apr 2010 20:32:39 +0200
+
+- in .Bl -column .It, "\t" seems to be synonymous to " Ta ",
+  see sysctl(3) for many examples;
+  mishandling this results in spurious quotes at EOL
+  reminded by guenther@  Mon, 26 Apr 2010 01:16:52 -0700
+
+- URGENT, this is making many kernel manuals look bad:
+  .Ft/.Fn should MAYBE behave in custom section like in SYNOPSIS?
+  autoconf.9:
+    .Sh DIRECT CONFIGURATION
+    .nr nS 1
+    .Ft "struct device *"
+    .Fn config_found_sm "struct device *parent"
+  groff:
+    DIRECT CONFIGURATION
+      struct device *
+      config_found_sm(struct device *parent, ...
+  reported by sthen  Tue, 20 Apr 2010 13:42:51 +0100
+
+- indentation got lost in SYNOPSIS, e.g.
+   SYNOPSIS
+        date [-ajnu] [-d dst] [-r seconds] [-t minutes_west] [+format]
+  -          [[[[[[cc]yy]mm]dd]HH]MM[.SS]]
+  +     [[[[[[cc]yy]mm]dd]HH]MM[.SS]]
+  reminded by Ludo Smissaert  Mon, 10 May 2010 12:15:11 +0200
+
+- empty phrases in .Bl column produce too few blanks
+  try e.g. .Bl -column It Ta Ta
+  reported by millert Fri, 02 Apr 2010 16:13:46 -0400
+
+
+- FIXED on bsd.lv for mdoc, need to merge and test in OpenBSD
+    kristaps@  Mon, 10 May 2010 03:12:44 +0200
+    man fix still pending!
+  in literal displays, ignore the right margin
+  reminded by stsp in net/pptp pptp.8  Fri, 23 Apr 2010 20:32:39 +0200
+
+- FIXED on bsd.lv, need to merge and test in OpenBSD
+    kristaps@  Mon, 10 May 2010 02:59:40 +0200
+  do not mark \*(Ba and | up
+  e.g. .Op Fl c Ar string \*(Ba Fl s \*(Ba Ar file Op Ar argument ...
+  The first should not be in an .Ar font.
+  The second must not end up as -|.
+  When fixing, check whether this is a specific problem with this
+  character, or whether other characters are affected, too.
+  reminded by jmc@  Sat, 24 Apr 2010 06:54:26 +0100
+
+
+************************************************************************
+* formatting issues: gratuitious differences
+************************************************************************
+
+- in literal context, groff disables the right margin
+  an example: syslog.conf.5 EXAMPLES section
+  reported by jmc Tue, 13 Apr 2010 10:12:15 +0100
+  solution: raise termp->maxrmargin in literal context
+
+- lines containing blank characters, and nothing else,
+  in literal context (.Bd -literal):
+  groff outputs just blank lines "\n"
+  mandoc outputs blanks to the left margin,
+  then the number of balnks minus one
+
+
+- FIXED bsd.lv mdoc_html.c 1.61 mdoc_term.c 1.117 kristaps@ 8.4.10
+  FIXED OpenBSD mdoc_html.c 1.12 mdoc_term.c 1.76 schwarze@ 8.5.10
+  mandoc .%T changed from quoted to underlined
+  reported by jmc Mon, 10 Aug 2009 05:50:21 +0100
+
+
+************************************************************************
+* parser errors without any effect on formatting
+************************************************************************
+
+- OpenBSD::PackageName(3p) has "if (block) 90:1" in the parse tree
+