docs: remove unnecessary references to the name of each program

docs/dj.1

@@ -148,7 +148,7 @@ the following format:
 
 If the
 .B -H
-option is specified, dj instead uses the following format:
+option is specified, the following format is used instead:
 
 .RS
 .R {records read} '+' {partial records read} '>' {records written}
@@ -156,9 +156,9 @@ option is specified, dj instead uses the following format:
 .R {ASCII line feed}
 .RE
 
-In non-recoverable errors that don’t pertain to dj’s read-write cycle, a
-diagnostic message is printed and dj exits with the appropriate sysexits.h(3)
-status.
+In non-recoverable errors that don’t pertain to the read-write cycle, a
+diagnostic message is printed and the program exits with the appropriate
+sysexits.h(3) status.
 
 .SH BUGS
 
@@ -177,12 +177,13 @@ versions of lowercase options.
 
 .SH RATIONALE
 
-Dj was modeled after the dd utility specified in POSIX but adds additional
-features: typical option formatting, allowing seeks to be specified in bytes
-rather than in blocks, allowing arbitrary bytes as padding, and printing in a
-format that’s easy to parse for machines. It also neglects character
-conversion, which may be dd’s original intent but is irrelevant to its modern
-use.
+The dd(1p) utility specified in POSIX was the basis of this program.
+
+It includes additional features: typical option formatting, allowing seeks to be
+specified in bytes rather than in blocks, allowing arbitrary bytes as padding, 
+and printing in a format that’s easy to parse for machines. It also neglects
+character conversion. This may have been the original intent of dd(1p) but it is
+irrelevant to its modern use as a disk utility.
 
 .SH COPYRIGHT