Remove some spurious "#->"s and sync a couple comments to say output

doc/Language/control.pod

@@ -214,7 +214,7 @@ All the same rules for semicolons and newlines apply, consistently
 
     if        0 { say "no" }
     elsif False { say "NO" }
-    else        { say "yes" }                              ; # -> says "yes"
+    else        { say "yes" }                              ; # says "yes"
 
 The whole thing either L<slips|/type/Slip> us an empty list (if no blocks
 were run) or returns the value produced by the block that did run:
@@ -242,20 +242,20 @@ the sense of a conditional statement.  You cannot use C<else> or C<elsif>
 with C<unless> because that ends up getting confusing.  Other than those
 two differences C<unless> works the same as L<if>:
 
-    unless 1 { "1 is false".say }  ; #-> does not say anything, since 1 is true
-    unless 1   "1 is false".say    ; #-> syntax error, missing block
-    unless 0 { "0 is false".say }  ; #-> says "0 is false"
+    unless 1 { "1 is false".say }  ; # does not say anything, since 1 is true
+    unless 1   "1 is false".say    ; # syntax error, missing block
+    unless 0 { "0 is false".say }  ; # says "0 is false"
 
-    unless 42.say and 1 { 43.say } ; #-> says "42" but does not say "43"
-    43.say unless 42.say and 0;      #-> says "42" and then says "43"
-    43.say unless 42.say and 1;      #-> says "42" but does not say "43"
+    unless 42.say and 1 { 43.say } ; # says "42" but does not say "43"
+    43.say unless 42.say and 0;      # says "42" and then says "43"
+    43.say unless 42.say and 1;      # says "42" but does not say "43"
 
-    $_ = 1; unless 0 { $_.say }           ; # -> says "1"
-    $_ = 1; unless 0 -> $_ { $_.say }     ; # -> says "0"
-    $_ = 1; unless False -> $a { $a.say } ; # -> says "False"
+    $_ = 1; unless 0 { $_.say }           ; # says "1"
+    $_ = 1; unless 0 -> $_ { $_.say }     ; # says "0"
+    $_ = 1; unless False -> $a { $a.say } ; # says "False"
 
-    my $c = 0; say (1, (unless 0 { $c += 42; 2; }), 3, $c); #-> says "1 2 3 42"
-    my $c = 0; say (1, (unless 1 { $c += 42; 2; }), 3, $c); #-> says "1 3 0"
+    my $c = 0; say (1, (unless 0 { $c += 42; 2; }), 3, $c); # says "(1 2 3 42)"
+    my $c = 0; say (1, (unless 1 { $c += 42; 2; }), 3, $c); # says "(1 3 0)"
 
 =head3 X<with, orwith, without|control flow,with orwith without>