doc/makedefs.6: Drop redundant br requests

Paragraphing macros in *roff systems generally break the output line,
and the same is true of all of man(7)'s paragraphing macros.

groff_man(7):
   Paragraphing macros
     These macros break the output line.  An ordinary paragraph (P)
     indents all output lines by the same amount.  A hanging paragraph
     (HP) is a cosmetic variant of P with a hanging indent.  Definition
     lists frequently occur in man pages; these can be set as tagged
     paragraphs, which have one (TP) or more (TQ) leading tags followed
     by a paragraph that has an additional indentation.

doc/makedefs.6

@@ -71,12 +71,10 @@ Upper and lower case are both accepted for the short commands.
 .B \-o
 Generate
 .IR onames.h .
-.br
 .TP
 .B \-d
 Generate
 .IR data.base .
-.br
 .TP
 .B \-e
 Generate
@@ -89,7 +87,6 @@ same logic as that used by the
 command; see the
 .B MDGREP FUNCTIONS
 section below for details.
-.br
 .TP
 .B \-m
 Generate
@@ -106,18 +103,15 @@ and
 info and include related preprocessor #defines in
 .I date.h
 file.
-.br
 .TP
 .B \-p
 Generate
 .IR pm.h .
-.br
 .TP
 .B \-q
 Generate the
 .I rumors
 file.
-.br
 .TP
 .B \-s
 Generate the
@@ -126,36 +120,30 @@ Generate the
 and
 .I epitaph
 files.
-.br
 .TP
 .B \-1
 Generate the
 .I epitaph
 file.
-.br
 .TP
 .B \-2
 Generate the
 .I engrave
 file.
-.br
 .TP
 .B \-3
 Generate the
 .I bogusmon
 file.
-.br
 .TP
 .B \-h
 Generate the
 .I oracles
 file.
-.br
 .SH LONG COMMANDS
 .TP
 .B \-\-debug
 Show debugging output.
-.br
 .TP
 .B \-\-make \fR[\fIcommand\fR]
 Execute a short command.
@@ -168,7 +156,6 @@ Specify the input
 for the command (if needed).
 If the file is \- standard
 input is read.
-.br
 .TP
 .BI \-\-output " file"
 Specify the output
@@ -176,12 +163,10 @@ Specify the output
 for the command (if needed).
 If the file is \- standard
 output is written.
-.br
 .TP
 .B \-\-svs \fR[\fIdelimiter\fR]
 Generate a version string to standard output without a trailing newline.
 If specified, the delimiter is used between each part of the version string.
-.br
 .TP
 .B \-\-grep
 Filter the input
@@ -190,17 +175,14 @@ Filter the input
 See the
 .B MDGREP FUNCTIONS
 section below for information on controlling the filtering operation.
-.br
 .TP
 .B \-\-grep\-showvars
 Show the name and value for each variable known to the grep option.
-.br
 .TP
 .B \-\-grep\-trace
 Turn on debug tracing for the grep function (
 .B \-\-grep
 must be specified as well).
-.br
 .TP
 .BI \-\-grep\-defined " symbol"
 Exit shell true (0) if
@@ -214,7 +196,6 @@ to be "defined."
 .I Symbol
 must already be known to
 .BR makedefs .
-.br
 .TP
 .BI \-\-grep\-undef " symbol"
 Force the definition of