[libcxx] [test] Fix comment typos, strip trailing whitespace.

No functional change, no code review.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@292434 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/utilities/tuple/tuple.tuple/tuple.cnstr/PR22806_constrain_tuple_like_ctor.pass.cpp

@@ -144,8 +144,8 @@ int main()
         assert(&std::get<0>(t2) == &t1);
     }
     // Test constructing a 1-tuple of the form tuple<UDT> from another 1-tuple
-    // 'tuple<T>' where UDT *can* be constructed from 'tuple<T>' In this case
-    // the 'tuple(UTypes...)' ctor should be choosen and 'UDT' constructed frow
+    // 'tuple<T>' where UDT *can* be constructed from 'tuple<T>'. In this case
+    // the 'tuple(UTypes...)' ctor should be chosen and 'UDT' constructed from
     // 'tuple<T>'.
     {
         using VT = ConstructibleFromTupleAndInt;

test/std/utilities/tuple/tuple.tuple/tuple.cnstr/default.pass.cpp

@@ -100,8 +100,8 @@ int main()
         assert(std::get<1>(t) == nullptr);
     }
     {
-    // Check that the SFINAE on the default constructor is not evaluted when
-    // it isn't needed. If the default constructor is evaluted then this test
+    // Check that the SFINAE on the default constructor is not evaluated when
+    // it isn't needed. If the default constructor is evaluated then this test
     // should fail to compile.
         IllFormedDefault v(0);
         std::tuple<IllFormedDefault> t(v);