fix some spellings mistakes

src/core/ext/filters/client_channel/http_connect_handshaker.h

@@ -25,7 +25,7 @@
 
 /// Channel arg indicating HTTP CONNECT headers (string).
 /// Multiple headers are separated by newlines.  Key/value pairs are
-/// seperated by colons.
+/// separated by colons.
 #define GRPC_ARG_HTTP_CONNECT_HEADERS "grpc.http_connect_headers"
 
 /// Registers handshaker factory.

src/core/ext/filters/deadline/deadline_filter.cc

@@ -124,7 +124,7 @@ static void cancel_timer_if_needed(grpc_deadline_state* deadline_state) {
     deadline_state->timer_state = GRPC_DEADLINE_STATE_FINISHED;
     grpc_timer_cancel(&deadline_state->timer);
   } else {
-    // timer was either in STATE_INITAL (nothing to cancel)
+    // timer was either in STATE_INITIAL (nothing to cancel)
     // OR in STATE_FINISHED (again nothing to cancel)
   }
 }

src/core/ext/filters/http/client/http_client_filter.cc

@@ -36,7 +36,7 @@
 #define EXPECTED_CONTENT_TYPE "application/grpc"
 #define EXPECTED_CONTENT_TYPE_LENGTH sizeof(EXPECTED_CONTENT_TYPE) - 1
 
-/* default maximum size of payload eligable for GET request */
+/* default maximum size of payload eligible for GET request */
 static constexpr size_t kMaxPayloadSizeForGet = 2048;
 
 static void recv_initial_metadata_ready(void* user_data, grpc_error* error);

src/core/ext/filters/http/client/http_client_filter.h

@@ -25,7 +25,7 @@
 /* Processes metadata on the client side for HTTP2 transports */
 extern const grpc_channel_filter grpc_http_client_filter;
 
-/* Channel arg to determine maximum size of payload eligable for GET request */
+/* Channel arg to determine maximum size of payload eligible for GET request */
 #define GRPC_ARG_MAX_PAYLOAD_SIZE_FOR_GET "grpc.max_payload_size_for_get"
 
 #endif /* GRPC_CORE_EXT_FILTERS_HTTP_CLIENT_HTTP_CLIENT_FILTER_H */

src/core/ext/transport/chttp2/alpn/alpn.h

@@ -23,7 +23,7 @@
 
 #include <string.h>
 
-/* Retuns 1 if the version is supported, 0 otherwise. */
+/* Returns 1 if the version is supported, 0 otherwise. */
 int grpc_chttp2_is_alpn_version_supported(const char* version, size_t size);
 
 /* Returns the number of protocol versions to advertise */

src/core/ext/transport/chttp2/transport/chttp2_transport.cc

@@ -1413,7 +1413,7 @@ static void perform_stream_op_locked(void* stream_op,
   // on_complete will be null if and only if there are no send ops in the batch.
   if (on_complete != nullptr) {
     // This batch has send ops. Use final_data as a barrier until enqueue time;
-    // the inital counter is dropped at the end of this function.
+    // the initial counter is dropped at the end of this function.
     on_complete->next_data.scratch = CLOSURE_BARRIER_FIRST_REF_BIT;
     on_complete->error_data.error = GRPC_ERROR_NONE;
   }

src/core/lib/surface/server.cc

@@ -123,7 +123,7 @@ typedef struct shutdown_tag {
 typedef enum {
   /* waiting for metadata */
   NOT_STARTED,
-  /* inital metadata read, not flow controlled in yet */
+  /* initial metadata read, not flow controlled in yet */
   PENDING,
   /* flow controlled in, on completion queue */
   ACTIVATED,

src/python/grpcio_tests/tests/stress/client.py

@@ -34,12 +34,12 @@ def _args():
         description='gRPC Python stress test client')
     parser.add_argument(
         '--server_addresses',
-        help='comma seperated list of hostname:port to run servers on',
+        help='comma separated list of hostname:port to run servers on',
         default='localhost:8080',
         type=str)
     parser.add_argument(
         '--test_cases',
-        help='comma seperated list of testcase:weighting of tests to run',
+        help='comma separated list of testcase:weighting of tests to run',
         default='large_unary:100',
         type=str)
     parser.add_argument(