Style URLs in GDB output

I noticed that GDB will display URLs in a few spots.  This changes
them to be styled.  Originally I thought I'd introduce a new "url"
style, but there aren't many places to use this, so I just reused
filename styling instead.  This patch also changes the debuginfod URL
list to be printed one URL per line.  I think this is probably a bit
easier to read.

gdb/debuginfod-support.c

@@ -181,10 +181,27 @@ debuginfod_is_enabled ()
 
   if (debuginfod_enabled == debuginfod_ask)
     {
-      int resp = nquery (_("\nThis GDB supports auto-downloading debuginfo " \
-			   "from the following URLs:\n%s\nEnable debuginfod " \
-			   "for this session? "),
-			 urls);
+      gdb_printf (_("\nThis GDB supports auto-downloading debuginfo " \
+		    "from the following URLs:\n"));
+
+      gdb::string_view url_view (urls);
+      while (true)
+	{
+	  url_view = url_view.substr (url_view.find_first_not_of (' '));
+	  if (url_view.empty ())
+	    break;
+	  size_t off = url_view.find_first_of (' ');
+	  gdb_printf
+	    (_("  <%ps>\n"),
+	     styled_string (file_name_style.style (),
+			    gdb::to_string (url_view.substr (0,
+							     off)).c_str ()));
+	  if (off == gdb::string_view::npos)
+	    break;
+	  url_view = url_view.substr (off);
+	}
+
+      int resp = nquery (_("Enable debuginfod for this session? "));
       if (!resp)
 	{
 	  gdb_printf (_("Debuginfod has been disabled.\nTo make this " \

gdb/doc/gdb.texinfo

@@ -26238,7 +26238,7 @@ their characteristics and the visual aspect of each style.
 The style-able objects are:
 @table @code
 @item filename
-Control the styling of file names.  By default, this style's
+Control the styling of file names and URLs.  By default, this style's
 foreground color is green.
 
 @item function

gdb/main.c

@@ -1495,8 +1495,8 @@ GDB manual (available as on-line info or a printed manual).\n\
 "), stream);
   if (REPORT_BUGS_TO[0] && stream == gdb_stdout)
     gdb_printf (stream, _("\n\
-Report bugs to %s.\n\
-"), REPORT_BUGS_TO);
+Report bugs to %ps.\n\
+"), styled_string (file_name_style.style (), REPORT_BUGS_TO));
   if (stream == gdb_stdout)
     gdb_printf (stream, _("\n\
 You can ask GDB-related questions on the GDB users mailing list\n\

gdb/testsuite/gdb.base/style.exp

@@ -309,8 +309,9 @@ proc run_style_tests { } {
 	# Check that the version string is styled in the output of 'show
 	# version', and that this styling can be disabled.
 	set vers [style "GNU gdb.*" version]
-	gdb_test "show version" "${vers}.*" \
-	    "version is styled in 'show version'"
+	set url [limited_style "http:.*html" file]
+	gdb_test "show version" "${vers}.*<$url>.*" \
+	    "'show version' is styled"
     }
 }
 

gdb/top.c

@@ -1428,9 +1428,11 @@ print_gdb_version (struct ui_file *stream, bool interactive)
      there is no warranty.  */
 
   gdb_printf (stream, "\
-License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\
+License GPLv3+: GNU GPL version 3 or later <%ps>\
 \nThis is free software: you are free to change and redistribute it.\n\
-There is NO WARRANTY, to the extent permitted by law.");
+There is NO WARRANTY, to the extent permitted by law.",
+		    styled_string (file_name_style.style (),
+				   "http://gnu.org/licenses/gpl.html"));
 
   if (!interactive)
     return;
@@ -1459,11 +1461,15 @@ There is NO WARRANTY, to the extent permitted by law.");
     {
       gdb_printf (stream,
 		  _("For bug reporting instructions, please see:\n"));
-      gdb_printf (stream, "%s.\n", REPORT_BUGS_TO);
+      gdb_printf (stream, "%ps.\n",
+		  styled_string (file_name_style.style (),
+				 REPORT_BUGS_TO));
     }
   gdb_printf (stream,
 	      _("Find the GDB manual and other documentation \
-resources online at:\n    <http://www.gnu.org/software/gdb/documentation/>."));
+resources online at:\n    <%ps>."),
+	      styled_string (file_name_style.style (),
+			     "http://www.gnu.org/software/gdb/documentation/"));
   gdb_printf (stream, "\n\n");
   gdb_printf (stream, _("For help, type \"help\".\n"));
   gdb_printf (stream,

gdb/utils.c

@@ -404,8 +404,9 @@ internal_vproblem (struct internal_problem *problem,
 
   gdb_puts (_("\nThis is a bug, please report it."), gdb_stderr);
   if (REPORT_BUGS_TO[0])
-    gdb_printf (gdb_stderr, _("  For instructions, see:\n%s."),
-		REPORT_BUGS_TO);
+    gdb_printf (gdb_stderr, _("  For instructions, see:\n%ps."),
+		styled_string (file_name_style.style (),
+			       REPORT_BUGS_TO));
   gdb_puts ("\n\n", gdb_stderr);
 
   if (problem->should_dump_core == internal_problem_ask)