Many small edits.

man/man1/spell.1

@@ -67,7 +67,7 @@ American spelling list
 .B \*9/lib/brspell
 British spelling list
 .TP
-.B /bin/aux/sprog
+.B \*9/bin/sprog
 The actual spelling checker.
 It expects one word per line on standard input,
 and takes the same arguments as
@@ -87,7 +87,7 @@ source for
 The heuristics of
 .IR deroff (1)
 used to excise formatting information are imperfect.
-.br
+.PP
 The spelling list's coverage is uneven;
 in particular biology, medicine, and chemistry, and
 perforce proper names,