bug about taylor_diagram.ncl

[andrewsoong]

Describe the bug
I want to boldface the lines of Taylor diagram by using NCL_V6.6.2, it does not work.
Peipei Liu and I found a bug in taylor_diagram.ncl（https://www.ncl.ucar.edu/Applications/Scripts/taylor_diagram.ncl） file which leads to this problem. In the part 3 of taylor_diagram.ncl file， there are 2 mistakes lines.

Provide the following:
It can not boldface the lines of Taylor diagram.

Computing environment

• OS: Linux
• OS version:Cent OS 6.10
• NCL Version: 6.6.2
• Installation method:binary from NCAR website

Additional context
The bugfix below：
Modify the taylor_diagram.ncl file in lines 292-293 to：
respl@gsLineThicknessF = 1.0 ; line thickness;
respl@gsLineDashPattern = 2 ; short dash lines;
The problem was resolved！