Fix markup.

Give Wolfram a credit for writing the original version in Perl
like in killall(1).

usr.bin/makewhatis/makewhatis.1

@@ -24,8 +24,6 @@
 .\"
 .\" $FreeBSD$
 .\"
-.\" Note: The date here should be updated whenever a non-trivial
-.\" change is made to the manual page.
 .Dd May 12, 2002
 .Dt MAKEWHATIS 1
 .Os
@@ -40,11 +38,11 @@
 .Op Fl o Ar file
 .Op Fl v
 .Op Fl L
-.Op Ar directories  ...
+.Op Ar directories ...
 .Sh DESCRIPTION
 The
 .Nm
-utility collects the names and short descriptions from  all the unformatted
+utility collects the names and short descriptions from all the unformatted
 man pages in the
 .Ar directories
 and puts them into a file used by the
@@ -57,20 +55,22 @@ If no
 .Ar directories
 are specified, the contents of the
 .Ev MANPATH
-environment variable will be used, or if that is not set the default directory
+environment variable will be used, or if that is not set, the default directory
 .Pa /usr/share/man
 will be processed.
 .Pp
 The options are as follows:
 .Bl -tag -width ".Fl i Ar column"
 .It Fl a
-Appends to the output file(s) instead of replacing them.  The output
+Appends to the output file(s) instead of replacing them.
+The output
 will be sorted with duplicate lines removed, but may have obsolete
 entries.
 .It Fl i Ar column
 Indents the description by
 .Ar column
-characters.  The default value is 24.
+characters.
+The default value is 24.
 .It Fl n Ar name
 Uses
 .Ar name
@@ -80,7 +80,7 @@ instead of
 Outputs all lines to the
 .Ar file
 instead of
-.Pa */whatis .
+.Pa */man/whatis .
 .It Fl v
 Makes
 .Nm
@@ -114,12 +114,20 @@ The default output file.
 .Sh DIAGNOSTICS
 .Ex -std
 .Sh SEE ALSO
-.Xr whatis 1 ,
-.Xr apropos 1
+.Xr apropos 1 ,
+.Xr whatis 1
 .Sh HISTORY
-A previous version of the
+The
 .Nm
 command appeared in
 .Fx 2.1 .
 .Sh AUTHORS
+.An -nosplit
+The
+.Nm
+program was originally written in Perl and was contributed by
+.An Wolfram Schneider .
+The current version of
+.Nm
+was rewritten in C by
 .An John Rochester .