Exercise Acronym
Hello, in the video you mention this case with  vs Â. Maybe we want to add this as a testcase? Raku normalizes them anyway, but just for completenes maybe? Unicode | Raku Documentation
I am not familar with how this begin/end strings get generated, hence here only the testcase. Maybe you like to add it.
my @l =
"\c[Latin Capital Letter A, Combining Grave Accent]",
"\c[Latin Capital Letter A with Grave]",
"\c[Latin Capital Letter E, Combining Grave Accent]",
"\c[Latin Capital Letter E with Grave]",
"\c[Latin Small Letter A, Combining Grave Accent]",
"\c[Latin Small Letter A with Grave]",
"\c[Latin Small Letter E, Combining Grave Accent]",
"\c[Latin Small Letter E with Grave]",
"\c[Latin Capital Letter ae with Macron]";
cmp-ok( # begin: ???
abbreviate(@l.join),
"eqv",
@l.first.uc,
'with graves or combined À à Ê è and Ǣ - single chars.',
); # end: ???
cmp-ok( # begin: ???
abbreviate(@l.join('xyz ')),
"eqv",
@l.join.uc,
'with graves or combined À à Ê è and Ǣ - and some attached normal chars.',
); # end: ???