docs: updates to use man(7) macros to fix formatting

docs/npc.1

@@ -3,20 +3,18 @@
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
-
-.TH npc 1
-
+.\"
+.TH NPC 1
 .SH NAME
-
 npc \(en show non-printing characters
-
+.\"
 .SH SYNOPSIS
-
+.\"
 npc
 .RB ( -et )
-
+.\"
 .SH DESCRIPTION
-
+.\"
 Print normally non-printing characters.
 
 The program reads from standard input and writes to standard output, replacing
@@ -26,41 +24,43 @@ character replaced (e.g. control-X becomes '^X'). The delete character (0x7F)
 becomes '^?'. Characters with the high bit set (>127) are printed as 'M-'
 followed by the graphical representation for the same character without the
 high bit set.
-
+.\"
 .SH USAGE
-
-.B -e
-.RS
+.\"
+.IP -e
 Prints a currency sign ('$') before each line ending.
-.RE
-
-.B -t
-.RS
+.IP -t
 Prints tab characters as '^I' rather than a literal horizontal tab.
-.RE
-
+.\"
 .SH DIAGNOSTICS
-
+.\"
 In the event of an error, a debug message will be printed and the program will
-exit with the appropriate sysexits.h(3) error code.
-
+exit with the appropriate
+.BR sysexits.h (3)
+error code.
+.\"
 .SH BUGS
-
+.\"
 The program operates in single-byte chunks regardless of intended encoding.
-
+.\"
 .SH RATIONALE
-
+.\"
 POSIX currently lacks a way to display non-printing characters in the terminal
-using a standard tool. A popular extension to cat(1p), the
+using a standard tool. A popular extension to
+.BR cat (1p),
+the
 .B -v
 option, is the bandage solution GNU and other software suites use.
-
+.\"
 This functionality is a separate tool because its usefulness extends beyond that
-of cat(1p).
-
+of
+.BR cat (1p).
+.\"
 .SH AUTHOR
 
-Written by DTB <trinity@trinity.moe>.
+Written by DTB
+.MT trinity@trinity.moe
+.ME .
 
 .SH COPYRIGHT
 
@@ -69,7 +69,8 @@ Copyright © 2023 DTB. License AGPLv3+: GNU AGPL version 3 or later
 
 .SH SEE ALSO
 
-cat(1p), cat-v(1)
+.BR cat (1p),
+.BR cat-v (1)
 
 .I UNIX Style, or cat -v Considered Harmful
 by Rob Pike