Document 'Unique rows and columns' option in Unruly, plus formatting tweaks

elsewhere.

[originally from svn r10035]

puzzles.but

@@ -1356,9 +1356,13 @@ board game \q{Mastermind}.
 you know that those will never be counted as part of the solution). This
 is turned off by default. 
 
+\lcont{
+
 Note that this doesn't allow blank pegs in the solution; if you really wanted
 that, use one extra colour.
 
+}
+
 \dt \e{Allow duplicates}
 
 \dd Allows the solution (and the guesses) to contain colours more than once;
@@ -2236,10 +2240,14 @@ extend before creating another island. This parameter determines how
 likely it is to extend as far as it can, rather than choosing
 somewhere closer.
 
+\lcont{
+
 High expansion factors usually mean easier puzzles with fewer
 possible islands; low expansion factors can create lots of
 tightly-packed islands.
 
+}
+
 
 \C{unequal} \i{Unequal}
 
@@ -2760,8 +2768,12 @@ These parameters are available from the \q{Custom...} option on the
 \dd Size of grid in squares. There will be half \e{Width} \by \e{Height}
 dominoes in the grid: if this number is odd then one square will be blank.
 
+\lcont{
+
 (Grids with at least one odd dimension tend to be easier to solve.)
 
+}
+
 \dt \e{Difficulty}
 
 \dd Controls the difficulty of the generated puzzle. At Tricky level,
@@ -2937,7 +2949,7 @@ leaving the clue square. The squares that are only adjacent \e{in the
 grid} are not constrained.)
 
 Credit for this puzzle goes to \i{Nikoli}, who call it \q{Masyu}.
-\k{nikoli-pearl}.
+\k{nikoli-pearl}
 
 Thanks to James Harvey for assistance with the implementation.
 
@@ -2973,6 +2985,7 @@ relative to the cursor, i.e. to draw a segment or a cross.
 These parameters are available from the \q{Custom...} option on the
 \q{Type} menu.
 
+
 \C{undead} \i{Undead}
 
 \cfg{winhelp-topic}{games.undead}
@@ -3103,6 +3116,11 @@ both the width and height to be even numbers.)
 
 \dd Controls the difficulty of the generated puzzle.
 
+\dt \e{Unique rows and columns}
+
+\dd If enabled, no two rows are permitted to have exactly the same
+pattern, and likewise columns. (A row and a column can match, though.)
+
 \A{licence} \I{MIT licence}\ii{Licence}
 
 This software is \i{copyright} 2004-2012 Simon Tatham.