Remove the redundant words in comments

Although it is spelling mistakes, it might make an affects while reading docs.

Co-Authored-By: Nguyen Phuong An <AnNP@vn.fujitsu.com>
Signed-off-by: Kim Bao Long <longkb@vn.fujitsu.com>

src/compiler/cpp_generator_helpers.h

@@ -52,7 +52,7 @@ inline grpc::string ClassName(const grpc::protobuf::Descriptor* descriptor,
 }
 
 // Get leading or trailing comments in a string. Comment lines start with "// ".
-// Leading detached comments are put in in front of leading comments.
+// Leading detached comments are put in front of leading comments.
 template <typename DescriptorType>
 inline grpc::string GetCppComments(const DescriptorType* desc, bool leading) {
   return grpc_generator::GetPrefixedComments(desc, leading, "//");

src/compiler/csharp_generator_helpers.h

@@ -32,7 +32,7 @@ inline bool ServicesFilename(const grpc::protobuf::FileDescriptor* file,
 }
 
 // Get leading or trailing comments in a string. Comment lines start with "// ".
-// Leading detached comments are put in in front of leading comments.
+// Leading detached comments are put in front of leading comments.
 template <typename DescriptorType>
 inline grpc::string GetCsharpComments(const DescriptorType* desc,
                                       bool leading) {

src/compiler/node_generator_helpers.h

@@ -31,7 +31,7 @@ inline grpc::string GetJSServiceFilename(const grpc::string& filename) {
 }
 
 // Get leading or trailing comments in a string. Comment lines start with "// ".
-// Leading detached comments are put in in front of leading comments.
+// Leading detached comments are put in front of leading comments.
 template <typename DescriptorType>
 inline grpc::string GetNodeComments(const DescriptorType* desc, bool leading) {
   return grpc_generator::GetPrefixedComments(desc, leading, "//");

src/compiler/php_generator_helpers.h

@@ -63,7 +63,7 @@ inline grpc::string GetPHPServiceFilename(
 }
 
 // Get leading or trailing comments in a string. Comment lines start with "// ".
-// Leading detached comments are put in in front of leading comments.
+// Leading detached comments are put in front of leading comments.
 template <typename DescriptorType>
 inline grpc::string GetPHPComments(const DescriptorType* desc,
                                    grpc::string prefix) {

src/compiler/ruby_generator_helpers-inl.h

@@ -47,7 +47,7 @@ inline grpc::string MessagesRequireName(
 }
 
 // Get leading or trailing comments in a string. Comment lines start with "# ".
-// Leading detached comments are put in in front of leading comments.
+// Leading detached comments are put in front of leading comments.
 template <typename DescriptorType>
 inline grpc::string GetRubyComments(const DescriptorType* desc, bool leading) {
   return grpc_generator::GetPrefixedComments(desc, leading, "#");

src/core/lib/surface/completion_queue.cc

@@ -1097,7 +1097,7 @@ static void cq_shutdown_next(grpc_completion_queue* cq) {
   }
   cqd->shutdown_called = true;
   /* Doing a full_fetch_add (i.e acq/release) here to match with
-   * cq_begin_op_for_next and and cq_end_op_for_next functions which read/write
+   * cq_begin_op_for_next and cq_end_op_for_next functions which read/write
    * on this counter without necessarily holding a lock on cq */
   if (gpr_atm_full_fetch_add(&cqd->pending_events, -1) == 1) {
     cq_finish_shutdown_next(cq);

src/python/grpcio_tests/tests/protoc_plugin/beta_python_plugin_test.py

@@ -195,7 +195,7 @@ def _CreateService(payload_pb2, responses_pb2, service_pb2):
 
   Yields:
     A (servicer_methods, stub) pair where servicer_methods is the back-end of
-      the service bound to the stub and and stub is the stub on which to invoke
+      the service bound to the stub and stub is the stub on which to invoke
       RPCs.
   """
     servicer_methods = _ServicerMethods(payload_pb2, responses_pb2)
@@ -237,7 +237,7 @@ def _CreateIncompleteService(service_pb2):
     service_pb2: The service_pb2 module generated by this test.
   Yields:
     A (servicer_methods, stub) pair where servicer_methods is the back-end of
-      the service bound to the stub and and stub is the stub on which to invoke
+      the service bound to the stub and stub is the stub on which to invoke
       RPCs.
   """