Graphically tests and presents the pdfcario terminal in gnuplot 5.0.3

testPDF.plt

# running it by "gnuplot testPDF.plt"
# the defualt termimal type for gnuplot is qt on my Ubuntu
# a `test` command will graphically gives the configuration info in a separatee window
# but for other terminals, e.g., pdf, the `test` command will bring a bunch of characotors
# (including mess code) in Terminal
# the right way is that we should output the configure info to a pdf file
# this gist will help us to do this
# you will see there exist great difference between the pdf and defaut qt terminal
# the line styles, font sizes, symbols, etc.

# set the terminal type to pdfcario
set term pdf

# set the results to file
set output "test.pdf"

# generate test info
test

# write the test info to a pdf file
set output