[BUG] incorrect marker size

[LaurentPlagne]

Details

The marker size in the legend does not match the marker size in the curve (too big).

MWE:

using Plots
pyplot()

n = 100
x = 1:n
y = rand(n)
p = plot(x, y, linewidth=2, marker=:circle, markercolor="white")

savefig(p, "toto.png")`

Backends

This bug occurs on ( insert x below )

Backend	yes	no	untested
gr (default)	x
pyplot	x		x
plotly			x
plotlyjs			x
pgfplotsx			x
inspectdr			x

Versions

Plots.jl version: 1.5.8

Output of versioninfo():
Julia Version 1.5.1
Commit 697e782ab8 (2020-08-25 20:08 UTC)
Platform Info:
OS: Linux (x86_64-pc-linux-gnu)
CPU: Intel(R) Core(TM) i5-9300H CPU @ 2.40GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-9.0.1 (ORCJIT, skylake)

[BeastyBlacksmith]

this got intentionally changed in #2643 and discussed in the references therein