Updated comments

include/spdlog/details/mpmc_blocking_q.h

@@ -37,7 +37,7 @@ class mpmc_blocking_queue {
         push_cv_.notify_one();
     }
 
-    // enqueue immediately. overrun oldest message in the queue if no room left.
+    // enqueue immediately. overrun the oldest message in the queue if no room left.
     void enqueue_nowait(T &&item) {
         {
             std::unique_lock<std::mutex> lock(queue_mutex_);

include/spdlog/sinks/async_sink.h

@@ -26,10 +26,9 @@ class async_sink final : public dist_sink<Mutex> {
 
     // Async overflow policy - block by default.
     enum class overflow_policy : std::uint8_t {
-        block,           // Block until message can be enqueued (default
-        overrun_oldest,  // Discard oldest message in the queue if full when trying to
-                         // add new item.
-        discard_new      // Discard new message if the queue is full when trying to add new item.
+        block,           // Block until the log message can be enqueued (default).
+        overrun_oldest,  // Overrun the oldest message in the queue if full.
+        discard_new      // Discard the log message if the queue is full
     };
 
     explicit async_sink(size_t queue_size = default_queue_size) {