[libcxx] [test] Strip trailing whitespace. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@319994 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/strings/basic.string/string.ends_with/ends_with.ptr.pass.cpp

@@ -30,7 +30,7 @@ int main()
 //  S   s4  { s + 1, 4 };
 //  S   s5  { s,     5 };
     S  sNot { "def", 3 };
-    
+
     LIBCPP_ASSERT_NOEXCEPT(s0.ends_with(""));
 
     assert ( s0.ends_with(""));

test/std/strings/basic.string/string.ends_with/ends_with.string_view.pass.cpp

@@ -31,7 +31,7 @@ int main()
 //  S   s4  { s + 1, 4 };
 //  S   s5  { s,     5 };
     S  sNot { "def", 3 };
-    
+
     SV  sv0;
     SV  sv1 { s + 4, 1 };
     SV  sv2 { s + 3, 2 };

test/std/strings/basic.string/string.starts_with/starts_with.string_view.pass.cpp

@@ -31,7 +31,7 @@ int main()
 //  S   s4  { s, 4 };
 //  S   s5  { s, 5 };
     S  sNot { "def", 3 };
-    
+
     SV  sv0;
     SV  sv1 { s, 1 };
     SV  sv2 { s, 2 };