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[Raku/en] Fix typo & grammar, Remove trailing whitespace, Update IRC (#4224)

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#raku has moved to irc.libera.chat
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@ -644,7 +644,7 @@ say @natural[^10]; # OUTPUT: «1 2 3 4 5 6 7 8 9 10␤», doesn't run out of mem
# NOTE: when reading an infinite list, Raku will "reify" the elements # NOTE: when reading an infinite list, Raku will "reify" the elements
# it needs, then keep them in memory. They won't be calculated more than once. # it needs, then keep them in memory. They won't be calculated more than once.
# It also will never calculate more elements that are needed. # It also will never calculate more elements than that are needed.
# An array subscript can also be a closure. It'll be called with the array's # An array subscript can also be a closure. It'll be called with the array's
# length as the argument. The following two examples are equivalent: # length as the argument. The following two examples are equivalent:
@ -744,7 +744,7 @@ first-of-array(@small); #=> 1
# Here, `@rest` is `(3,)`, since `$fst` holds the `2`. This results # Here, `@rest` is `(3,)`, since `$fst` holds the `2`. This results
# since the length (.elems) of `@rest` is 1. # since the length (.elems) of `@rest` is 1.
sub slurp-in-array(@ [$fst, *@rest]) { sub slurp-in-array(@ [$fst, *@rest]) {
say $fst + @rest.elems; say $fst + @rest.elems;
} }
slurp-in-array(@tail); # OUTPUT: «3␤» slurp-in-array(@tail); # OUTPUT: «3␤»
@ -1024,14 +1024,14 @@ sub call_say_dyn {
my $*dyn_scoped_1 = 25; my $*dyn_scoped_1 = 25;
# Will change the value of the file scoped variable. # Will change the value of the file scoped variable.
$*dyn_scoped_2 = 100; $*dyn_scoped_2 = 100;
# $*dyn_scoped 1 and 2 will be looked for in the call. # $*dyn_scoped 1 and 2 will be looked for in the call.
say_dyn(); # OUTPUT: «25 100␤» say_dyn(); # OUTPUT: «25 100␤»
# The call to `say_dyn` uses the value of $*dyn_scoped_1 from inside # The call to `say_dyn` uses the value of $*dyn_scoped_1 from inside
# this sub's lexical scope even though the blocks aren't nested (they're # this sub's lexical scope even though the blocks aren't nested (they're
# call-nested). # call-nested).
} }
say_dyn(); # OUTPUT: «1 10␤» say_dyn(); # OUTPUT: «1 10␤»
@ -1853,7 +1853,7 @@ my @fibv2 = 1, 1, { $^a + $^b } ... *;
# In the example we use a range as an index to access the sequence. However, # In the example we use a range as an index to access the sequence. However,
# it's worth noting that for ranges, once reified, elements aren't re-calculated. # it's worth noting that for ranges, once reified, elements aren't re-calculated.
# That's why, for instance, `@primes[^100]` will take a long time the first # That's why, for instance, `@primes[^100]` will take a long time the first
# time you print it but then it will be instateneous. # time you print it but then it will be instantaneous.
say @fibv0[^10]; # OUTPUT: «1 1 2 3 5 8 13 21 34 55␤» say @fibv0[^10]; # OUTPUT: «1 1 2 3 5 8 13 21 34 55␤»
#################################################### ####################################################
@ -2262,7 +2262,7 @@ This information may be a bit older but there are many great examples and
explanations. Posts stopped at the end of 2015 when the language was declared explanations. Posts stopped at the end of 2015 when the language was declared
stable and `Raku v6.c` was released. stable and `Raku v6.c` was released.
- Come along on `#raku` at [`irc.freenode.net`](https://webchat.freenode.net/?channels=#raku). The folks here are - Come along on `#raku` at [`irc.libera.chat`](https://web.libera.chat/?channel=#raku). The folks here are
always helpful. always helpful.
- Check the [source of Raku's functions and - Check the [source of Raku's functions and