Make error message easier to type

Using single- or double-quotation marks in an error message shortens
one's life.  Standardizing on "Use of goto to jump" avoids this and is
consistent with the majority of such messages which begin with 'Use of'.

Author: jkeenan

pod/perldiag.pod

@@ -7826,6 +7826,10 @@ valid for UTF-8 locales, which the current locale isn't.  This doesn't
 make sense.  Perl will continue, assuming a Unicode (UTF-8) locale, but
 the results are likely to be wrong.
 
+=item Use of goto to jump into a construct is no longer permitted
+
+(F) More TO COME.
+
 =item Use of freed value in iteration
 
 (F) Perhaps you modified the iterated array within the loop?

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

@@ -86,6 +86,6 @@ 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");
 }