[clang][tests] Fix expected output of plugin-attribute test

[tbaeder]

Summary

The output contains "const char[11]", not "const char [11]".

I don't think this test is being run in CI at all because it requires both examples and plugins.

[tbaeder]

Already fixed by 50082e1882ae7fe101e563c5e18a27e0804d517b

clang/test/Frontend/plugin-attribute.cpp

 // RUN: split-file %s %t
 // RUN: %clang -cc1 -load %llvmshlibdir/Attribute%pluginext -fsyntax-only -ast-dump -verify %t/good_attr.cpp | FileCheck %s
 // RUN: %clang -fplugin=%llvmshlibdir/Attribute%pluginext -fsyntax-only -Xclang -verify %t/bad_attr.cpp
 // REQUIRES: plugins, examples
 //--- good_attr.cpp
 // expected-no-diagnostics
 void fn1a() __attribute__((example)) {}
 [[example]] void fn1b() {}
 [[plugin::example]] void fn1c() {}
 void fn2() __attribute__((example("somestring", 1, 2.0))) {}
 // CHECK-COUNT-4: -AnnotateAttr 0x{{[0-9a-z]+}} {{<col:[0-9]+(, col:[0-9]+)?>}} "example"
-// CHECK: -StringLiteral 0x{{[0-9a-z]+}} {{<col:[0-9]+(, col:[0-9]+)?>}} 'const char [{{[0-9]+}}]' lvalue "somestring"
+// CHECK: -StringLiteral 0x{{[0-9a-z]+}} {{<col:[0-9]+(, col:[0-9]+)?>}} 'const char[{{[0-9]+}}]' lvalue "somestring"
 // CHECK: -IntegerLiteral 0x{{[0-9a-z]+}} {{<col:[0-9]+(, col:[0-9]+)?>}} 'int' 1
 // CHECK: -FloatingLiteral 0x{{[0-9a-z]+}} {{<col:[0-9]+(, col:[0-9]+)?>}} 'double' 2.000000e+00
 
 //--- bad_attr.cpp
 int var1 __attribute__((example("otherstring"))) = 1; // expected-warning {{'example' attribute only applies to functions}}
 class Example {
   void __attribute__((example)) fn3(); // expected-error {{'example' attribute only allowed at file scope}}
 };
 void fn4() __attribute__((example(123))) { } // expected-error {{first argument to the 'example' attribute must be a string literal}}
 void fn5() __attribute__((example("a","b", 3, 4.0))) { } // expected-error {{'example' attribute only accepts at most three arguments}}