Consistently change from "bullet operator" (unicode 0x2219) to "bullet, alias black small circle" (unicode 0x2022) to assure consistently round results for all fonts corresponding to Hershey indices 143 and 850.  (Some modern fonts use a filled square glyph for 0x2219, but as far as I can tell no modern fonts do that for 0x2022 which is consistent with its alias name of "black small circle").
Consistently change from "bullet operator" (unicode 0x2219) to "bullet,
alias black small circle" (unicode 0x2022) to assure consistently round
results for all fonts corresponding to Hershey indices 143 and 850.  (Some
modern fonts use a filled square glyph for 0x2219, but as far as I can tell
no modern fonts do that for 0x2022 which is consistent with its alias name
of "black small circle").

N.B. the tables for further translation from unicode to type1 font index
(contained in include/plunicode-type1.h) for the ps and pdf devices include
an entry for both 0x2219 and 0x2022.  The resulting type 1 indices are
different, but the results using

examples/c/x06c -dev psc -o test.ps -drvopt hrshsym=0

look good (small round filled circle for position 17) so no changes need to
be made to include/plunicode-type1.h to be consistent with the present
change.


svn path=/trunk/; revision=11083

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot