Fix the placement of bracket construction pieces in PDF

[edeemer]

The proposed commit removes PostScript definitions that alter the positions of bracket construction symbols in the \[bracket*], \[brace*] and \[paren*] groups. The alternations produce disconnection in the PDFs generated with ghostscript, though the original PostScript output looks fine.

For example, the input

.nr PS 26
.PP
\b'\[bracketlefttp]\[bracketleftex]'\~
\b'\[bracketrighttp]\[bracketrightex]'\~
\b'\[bracelefttp]\[braceleftmid]'\~
\b'\[bracerighttp]\[bracerightmid]'\~
\b'\[parenlefttp]\[parenleftex]'\~
\b'\[parenrighttp]\[parenrightex]'\~
.br
.sp 8v
.PP
\b'\[bracketlefttp]\[bracketleftex]\[bracketleftbt]'\~
\b'\[bracketrighttp]\[bracketrightex]\[bracketrightbt]'\~
\b'\[bracelefttp]\[braceleftmid]\[braceleftbt]'\~
\b'\[bracerighttp]\[bracerightmid]\[bracerightbt]'\~
\b'\[parenlefttp]\[parenleftex]\[parenleftbt]'\~
\b'\[parenrighttp]\[parenrightex]\[parenrightbt]'\~

looks like that in PDF document generated with ps2pdf:

After the commit, the pieces connect correctly both in PostScript and in PDF:

EDIT: since the changed file is treated as a binary, the diff is as follows:

--- a/troff/troff.d/postscript/dpost.ps
+++ b/troff/troff.d/postscript/dpost.ps
@@ -217,12 +217,6 @@

 /Sdefs [
        /underscore             [0 0 500 0]
-       /bracketlefttp          [208 500]
-       /bracketleftbt          [208 500]
-       /bracketrighttp         [-60 380]
-       /bracketrightbt         [-60 380]
-       /braceleftbt            [209 490]
-       /bracketrightex         [220 -125 500 0]
        /radical                [0 0 550 0]
        % NeWSprint's \(br is too low, compensate
        statusdict /product get (NeWS Server) eq {
@@ -231,7 +225,6 @@

        } {
                /radicalex              [-50 0 500.001 0]
-               /parenleftex            [-20 -170 0 0]
        } ifelse
        /integral               [100 -50 500 0]
        /infinity               [10 -75 730 0]

[n-t-roff]

@reffort (and others): are there any objections with this patch?