Rephrase barrier docs to use 'parity' more

Author: wmaxey

docs/extended_api/synchronization_primitives/barrier.md

@@ -23,7 +23,7 @@ It has the same interface and semantics as [`cuda::std::barrier`], with the
 
 | [`cuda::barrier::init`]                        | Initialize a `cuda::barrier`. `(friend function)`                 |
 | [`cuda::device::barrier_native_handle`]        | Get the native handle to a `cuda::barrier`. `(function template)` |
-| [`cuda::barrier::wait_parity/try_wait_parity`] | Wait on a `specific` phase of the barrier |
+| [`cuda::barrier::wait_parity/try_wait_parity`] | Wait on or check the parity of the barrier. |
 
 ## NVCC `__shared__` Initialization Warnings
 

docs/extended_api/synchronization_primitives/barrier/wait_parity.md

@@ -12,8 +12,8 @@ __host__ __device__ void cuda::std::barrier::wait_parity(bool phase);
 __host__ __device__ bool cuda::std::barrier::try_wait_parity(bool phase);
 ```
 
-`barrier::wait_parity` stalls execution while the barrier is not at the specified phase.
-`barrier::try_wait_parity` queries the the state of the barrier against the specified phase.
+`barrier::wait_parity` stalls execution while the barrier is not at the specified parity.
+`barrier::try_wait_parity` returns true if the parity of the barrier matches the given parity.
 
 ## Return Value