Imp: travis script

.travis.yml

 language: go
 
+os:
+  - linux
+
 go:
   - "1.13"
 
 env:
   - GO111MODULE=on
 
+install: true
+
 script:
   - go fmt ./... && [[ -z `git status -s` ]]
   - go mod vendor && go test $(go list ./... | grep -v vendor | grep -v demo) -coverprofile=coverage.txt -covermode=atomic

session.go

@@ -448,8 +448,8 @@ func (s *session) WriteBytesArray(pkgs ...[]byte) error {
 
 	// reduce syscall and memcopy for multiple packages
 	if _, ok := s.Connection.(*gettyTCPConn); ok {
-	        if _, err := s.Connection.send(pkgs); err != nil {
-		        return perrors.Wrapf(err, "s.Connection.Write(pkgs num:%d)", len(pkgs))
+		if _, err := s.Connection.send(pkgs); err != nil {
+			return perrors.Wrapf(err, "s.Connection.Write(pkgs num:%d)", len(pkgs))
 		}
 	}