Log Message:
Update to 1.12.3:

Changes in version 1.12.3, released on December 31, 2013

 * In the mdoc(7) SYNOPSIS, line breaks and hanging indentation
   now work correctly for .Fo/.Fa/.Fc and .Fn blocks.
   Thanks to Franco Fichtner for doing part of the work.
 * The mdoc(7) .Bk macro got some addititonal bugfixes.
 * In mdoc(7) macro arguments, double quotes can now be quoted
   by doubling them, just like in man(7).
   Thanks to Tsugutomo ENAMI for the patch.
 * At the end of man(7) macro lines, end-of-sentence spacing
   now works.  Thanks to Franco Fichtner for the patch.
 * For backward compatibility, the man(7) parser now supports the
   man-ext .UR/.UE (uniform resource identifier) block macros.
 * The man(7) parser now handles closing blocks that are not open
   more gracefully.
 * The man(7) parser now ignores blank lines right after .SH and .SS.
 * In the man(7) formatter, reset indentation when leaving a block,
   not just when entering the next one.
 * The roff(7) .nr request now supports incrementing and decrementing
   number registers and stops parsing the number right before the
   first non-digit character.
 * The roff(7) parser now supports the alternative escape sequence
   syntax \C'uXXXX' for Unicode characters.
 * The roff(7) parser now parses and ignores the .fam (font family)
   and .hw (hyphenation points) requests and the \d and \u escape
   sequences.
 * The roff(7) manual got a new ESCAPE SEQUENCE REFERENCE.