Avoid matching exception message with format info

This will avoid tests from failing because of format changes like
ruby/ruby#4857

Author: st0012

test/console/debugger_local_test.rb

@@ -34,7 +34,7 @@ def test_raised_is_accessible_from_repl
             type "catch Exception"
             type "c"
             type "_raised"
-            assert_line_text(/#<NameError: undefined local variable or method `foo' for main:Object/)
+            assert_line_text(/undefined local variable or method `foo' for main:Object/)
             type "c"
           end
         end
@@ -43,7 +43,7 @@ def test_raised_is_accessible_from_command
           debug_code(program) do
             type "catch Exception pre: p _raised"
             type "c"
-            assert_line_text(/#<NameError: undefined local variable or method `foo' for main:Object/)
+            assert_line_text(/undefined local variable or method `foo' for main:Object/)
             type "c"
           end
         end
@@ -96,7 +96,7 @@ def test_raised_doesnt_leak_to_program_binding
 
             # stops for NoMethodError because _raised is not defiend in the program
             type "_raised"
-            assert_line_text(/NameError: undefined local variable or method `_raised' for main:Object/)
+            assert_line_text(/undefined local variable or method `_raised' for main:Object/)
             type "c"
           end
         end
@@ -155,7 +155,7 @@ def test_raised_doesnt_leak_to_program_binding
             type "c"
             # stops for NoMethodError because _return is not defiend in the program
             type "_raised"
-            assert_line_text(/NameError: undefined local variable or method `_return' for main:Object/)
+            assert_line_text(/undefined local variable or method `_return' for main:Object/)
             type "c"
           end
         end