Hdtbl proposal to add separte vertical , horizontal cell spacing.

[Wim Stockman]

Hi,
I was makin a table with Hdtbl macro set. Which works nice.
But I noticed I couldn't change the cell spacing separately for the
vertical space and horizontal space.
So I looked into the macro set and sorted it out. So I can set it
separately.
I called it the argument cspb since I found this register was already in
use for calculating the vertical space.
Here the diff file
Kind regards
Wim Stockman

--- ./hdtbl.tmac-u      2020-10-28 21:46:56.993442819 +0100
+++ ./hdtbl.tmac-u      2021-01-30 15:02:10.558188791 +0100
@@ -52,6 +52,7 @@
 .ds t*bc red4\"
 .nr t*cpd .5n
 .nr t*csp .5n
+.nr t*cspb 1c
 .nr t*b .1n
 .nr t*cols 1
 .nr t*v \n[.v]
@@ -134,6 +135,16 @@
 .      tm \\n[.F]:\\n[.c]: Invalid cell padding value '\\*[cpd]'.
 .  \}
 .
+.  t*getarg cspb \\*[args]                 \"  vertical cell spacing
+.  ie "\\*[cspb]"" \
+.    nr t*cspb\\n[t*#] \\n[t*cspb]
+.  el \{\
+.    ie \B\\*[cspb] \
+.      nr t*cspb\\n[t*#] \\*[cspb]
+.    el \
+.      tm \\n[.F]:\\n[.c]: Invalid verctical cell spacing value '\\*[cspb]'.
+.  \}
+.
 .  t*getarg csp \\*[args]                 \"   cell spacing
 .  ie "\\*[csp]"" \
 .    nr t*csp\\n[t*#] \\n[t*csp]
@@ -144,6 +155,7 @@
 .      tm \\n[.F]:\\n[.c]: Invalid cell spacing value '\\*[csp]'.
 .  \}
 .
+.
 .  t*getarg border \\*[args]              \"   border thickness
 .  ie "\\*[border]"=" \
 .    nr t*b\\n[t*#] 0-1
@@ -183,6 +195,7 @@
 .
 .  nr b/2\\n[t*#] (\\n[t*b\\n[t*#]] / 2)\"     shortcut
 .  nr cscp\\n[t*#] (\\n[t*csp\\n[t*#]] + \\n[t*cpd\\n[t*#]])\"  aux. register
+.  nr cscpb\\n[t*#] (\\n[t*csp\\n[t*#]] + \\n[t*cpd\\n[t*#]])\"  aux. register
 .
 .  t*getarg height \\*[args]              \"   table outline height
 .  ie "\\*[height]"" \
@@ -190,7 +203,7 @@
 .  el \{\
 .    ie \B\\*[height] \
 .      nr t*height\\n[t*#] (\\*[height] \
-                            - ((2 * \\n[cscp\\n[t*#]]) \
+                            - ((2 * \\n[cscpb\\n[t*#]]) \
                                 + (3 * \\n[b/2\\n[t*#]])))
 .    el \
 .      tm \\n[.F]:\\n[.c]: Invalid height value '\\*[height]'.
@@ -548,7 +561,7 @@
 .
 .  nr b/2 \\n[b/2\\n[t*#]]             \"      some abbreviations
 .  nr cscp \\n[cscp\\n[t*#]]
-.  nr cscpb (\\n[b/2] + \\n[cscp])
+.  nr cscpb \\n[t*cspb\\n[t*#]]
 .
 .  nr topdiv (\\n[.d] + \\n[b/2] - \\n[cscp])\"        top of cell diversion
 .  nr cscpb2 (\\n[b/2] / 2 + \\n[cscp])