Plot: labelling multiple expressions at once

[jondo]

With SymPy 1.9, the code

import sympy as sp
x = sp.Symbol('x')
f = x
g = 2*x

p = sp.plot(f, g, label=('f','g'), show=False)
p.legend = True
p.show()

gives:

It might be more useful in this case if the elements of the label argument were used as separate labels for the printed expressions.

The current workaround is

p = sp.plot(f, label='f', show=False)
p2 = sp.plot(g, label='g', show=False)
p.append(p2[0])
p.legend = True
p.show()

This creates the expected

This issue is similar to @Davide-sd 's #21300.

[NikhilSDate]

It seems like there is already a pull request (#21302) linked with #21300, but it is still open. I might be wrong here, but it seems like that pull request changes things so that the label has to specified along with the expression to be plotted in a tuple. I feel that the approach mentioned in this issue (providing the labels as a separate argument) is a bit cleaner. If it is worthwhile to fix this issue, I would be happy to work on this issue, but I'm not sure if a fix is needed in the first place. Any thoughts?