test PyPlot failed

[rjabkov]

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Windows 7 64bit Julia 1.4.2 Python 3.8.3 ENV["PYTHON"] = "C:\\ProgramData\\Anaconda3\\python.exe" Matplotlib 3.2.2

Tests passed after editing runtests.jl:

    # m = match(r"%%BoundingBox: *([0-9]+) +([0-9]+) +([0-9]+) +([0-9]+)", s)
    m = match(r"%%BoundingBox: *([0-9\.]+) +([0-9\.]+) +([0-9\.]+) +([0-9\.]+)", s)

    # boundingbox = map(s -> parse(Int, s), m.captures)
    boundingbox = map(s -> parse(Float64, s), m.captures)