Restore double-quotes around goto in error message

Per Tony Cook request.

Author: jkeenan

pod/perldiag.pod

@@ -7845,7 +7845,7 @@ For speed and efficiency reasons, Perl internally does not do full
 reference-counting of iterated items, hence deleting such an item in the
 middle of an iteration causes Perl to see a freed value.
 
-=item Use of goto to jump into a construct is no longer permitted
+=item Use of "goto" to jump into a construct is no longer permitted
 
 (F) More TO COME.
 

pp_ctl.c

@@ -3652,7 +3652,7 @@ PP(pp_goto)
                     ? 2
                     : 1;
             if (enterops[i])
-                croak("Use of goto to jump into a construct is no longer permitted");
+                croak("Use of \"goto\" to jump into a construct is no longer permitted");
         }
 
         /* pop unwanted frames */

t/lib/croak/pp_ctl

@@ -3,18 +3,18 @@ __END__
 goto f;
 foreach(1){f:}
 EXPECT
-Use of goto to jump into a construct is no longer permitted at - line 1.
+Use of "goto" to jump into a construct is no longer permitted at - line 1.
 ########
 # NAME goto into given
 goto f;
 CORE::given(1){f:}
 EXPECT
-Use of goto to jump into a construct is no longer permitted at - line 1.
+Use of "goto" to jump into a construct is no longer permitted at - line 1.
 ########
 # NAME goto from given topic expression
 CORE::given(goto f){f:}
 EXPECT
-Use of goto to jump into a construct is no longer permitted at - line 1.
+Use of "goto" to jump into a construct is no longer permitted at - line 1.
 ########
 # NAME goto into expression
 no warnings 'deprecated';

t/uni/labels.t

@@ -86,7 +86,7 @@ is $d, 0, "Latin-1 labels are reachable";
         }
     };
     like($@,
-        qr/Use of goto to jump into a construct is no longer permitted/,
+        qr/Use of "goto" to jump into a construct is no longer permitted/,
         "Got expected error message");
 }