mention how to quote a comma in "call"

[jidanni]

Your
  reverse = $(2) $(1)
example in the manual is great, however if one day your users happen
to want to quote a comma,
OK:;echo $(call reverse,a,b)
SORRY1:;echo $(call reverse,a\,b,c)
SORRY2:;echo $(call reverse,"a,b",c)
then they are S.O.L. unless you mention how.

One apparently needs to do
EE=a,b
OK2:;echo $(call reverse,$(EE),c)

Mention that it is the only(?) way.

Wait,
OK3:;s=,;echo $(call reverse,a$${s}b,c)