Shorten internal problem help text

The help text for various "internal problem" settings is longer than
80 columns.  This patch tightens this up a bit.  Note that these
commands are all "maint" commands so, IMO, it is sufficient if they
are clear to a gdb developer.

Reviewed-By: Eli Zaretskii <eliz@gnu.org>
diff --git a/gdb/utils.c b/gdb/utils.c
index a1bf9e4..2932efc 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -597,11 +597,11 @@ add_internal_problem_command (struct internal_problem *problem)
   if (problem->user_settable_should_dump_core)
     {
       std::string set_core_doc
-	= string_printf (_("Set whether GDB should create a core file of "
-			   "GDB when %s is detected."), problem->name);
+	= string_printf (_("Set whether GDB should dump core "
+			   "when %s is detected."), problem->name);
       std::string show_core_doc
-	= string_printf (_("Show whether GDB will create a core file of "
-			   "GDB when %s is detected."), problem->name);
+	= string_printf (_("Show whether GDB should dump core "
+			   "when %s is detected."), problem->name);
       add_setshow_enum_cmd ("corefile", class_maintenance,
 			    internal_problem_modes,
 			    &problem->should_dump_core,
@@ -617,11 +617,11 @@ add_internal_problem_command (struct internal_problem *problem)
   if (problem->user_settable_should_print_backtrace)
     {
       std::string set_bt_doc
-	= string_printf (_("Set whether GDB should print a backtrace of "
-			   "GDB when %s is detected."), problem->name);
+	= string_printf (_("Set whether GDB should show backtrace "
+			   "when %s is detected."), problem->name);
       std::string show_bt_doc
-	= string_printf (_("Show whether GDB will print a backtrace of "
-			   "GDB when %s is detected."), problem->name);
+	= string_printf (_("Show whether GDB should show backtrace "
+			   "when %s is detected."), problem->name);
       add_setshow_boolean_cmd ("backtrace", class_maintenance,
 			       &problem->should_print_backtrace,
 			       set_bt_doc.c_str (),