Minor tweaks after renaming of perl6 to rakudo

Follow up on rakudo/rakudo@0bebe4e23a.

MISC/bug-coverage-stress.t

@@ -30,7 +30,7 @@ doesn't-hang ｢
 
 
 # https://github.com/Raku/old-issue-tracker/issues/6490
-#?rakudo.jvm skip "The spawned command './perl6-j' exited unsuccessfully (exit code: 1)"
+#?rakudo.jvm skip "The spawned command './rakudo-j' exited unsuccessfully (exit code: 1)"
 #?DOES 1
 {
   if $*DISTRO.is-win {

S01-perl-5-integration/eval_lex.t

@@ -20,7 +20,7 @@ subtest 'EVAL/EVALFILE evals Buf like perl would execute source file' => {
 
     # The $result Buf was obtained by running:
     # perl -e 'no warnings; print qq|♥\x{26666}|; { use utf8; print qq|♥\x{26666}| }' |
-    #    ./perl6 -e '$*IN.encoding(Nil); $*IN.slurp.raku.say'
+    #    ./rakudo -e '$*IN.encoding(Nil); $*IN.slurp.raku.say'
     my $result = Buf[uint8].new(195,162,194,153,194,165,240,166,153,166,226,153,165,240,166,153,166);
 
     my $code = ｢no warnings; print qq|♥\x{26666}|; { use utf8; print qq|♥\x{26666}| }｣;

test_summary

@@ -303,7 +303,7 @@ sub begin {
         }
     }
     open( $self->{'file_out'}, '>', 'docs/test_summary.times.tmp') or die "cannot create docs/test_summary.times.tmp: $!";
-    my $parrot_version = qx{./perl6 -e'print \$*VM.config<revision>'};
+    my $parrot_version = qx{./rakudo -e'print \$*VM.config<revision>'};
     my $impl_version = qx{git log --pretty=oneline --abbrev-commit --max-count=1 .}; chomp $impl_version;
     $impl_version =~ s/^([0-9a-f])+\.\.\./$1/; # delete possible ...
     $impl_version =~ s/\\/\\\\/g; # escape all backslashes
@@ -508,7 +508,7 @@ sub get_test_names {
 sub run_test {
     my ($self, $tfile) = @_;
 
-    my $cmd = "./perl6 $tfile";
+    my $cmd = "./rakudo $tfile";
     # Run the test, collecting all stdout in @results
     scalar qx{$cmd};
 }