fix linebreak issue (#75)

Signed-off-by: Loong Dai <loong.dai@intel.com>

pkg/gci/gci.go

@@ -184,8 +184,10 @@ func LoadFormatGoFile(file io.FileObj, cfg config.Config) (src, dist []byte, err
 				body = append(body, utils.Linebreak)
 			}
 		}
+	}
 
-		// remove breakline in the end
+	// remove breakline in the end
+	if body[len(body)-1] == utils.Linebreak && tail[0] == utils.Linebreak {
 		body = body[:len(body)-1]
 	}
 

pkg/gci/internal/testdata/linebreak-no-custom.cfg.yaml

@@ -0,0 +1,4 @@
+sections:
+  - Standard
+  - Default
+  - Prefix(github.com/daixiang0)

pkg/gci/internal/testdata/linebreak-no-custom.in.go

@@ -0,0 +1,7 @@
+package main
+import (
+	g "github.com/golang"
+
+	"fmt"
+
+)

pkg/gci/internal/testdata/linebreak-no-custom.out.go

@@ -0,0 +1,6 @@
+package main
+import (
+	"fmt"
+
+	g "github.com/golang"
+)

pkg/gci/internal/testdata/linebreak.cfg.yaml

@@ -0,0 +1,4 @@
+sections:
+  - Standard
+  - Default
+  - Prefix(github.com/daixiang0)

pkg/gci/internal/testdata/linebreak.in.go

@@ -0,0 +1,9 @@
+package main
+import (
+	g "github.com/golang"
+
+	"fmt"
+
+	"github.com/daixiang0/gci"
+
+)

pkg/gci/internal/testdata/linebreak.out.go

@@ -0,0 +1,8 @@
+package main
+import (
+	"fmt"
+
+	g "github.com/golang"
+
+	"github.com/daixiang0/gci"
+)