diff --git a/file-util.go b/file-util.go
index 96390f6..fba6f0a 100644
--- a/file-util.go
+++ b/file-util.go
@@ -95,23 +95,23 @@ func MoveFile(sourcePath, destPath string) (int64, error) {
 	if err != nil {
 		inputFile, err := os.Open(sourcePath)
 		if err != nil {
-			return 0, fmt.Errorf("Couldn't open source file: %s", err)
+			return 0, fmt.Errorf("couldn't open source file: %s", err)
 		}
 		outputFile, err := os.Create(destPath)
 		if err != nil {
 			inputFile.Close()
-			return 0, fmt.Errorf("Couldn't open dest file: %s", err)
+			return 0, fmt.Errorf("couldn't open dest file: %s", err)
 		}
 		defer outputFile.Close()
 		size, err = io.Copy(outputFile, inputFile)
 		inputFile.Close()
 		if err != nil {
-			return 0, fmt.Errorf("Writing to output file failed: %s", err)
+			return 0, fmt.Errorf("failed writing to output file: %s", err)
 		}
 		// The copy was successful, so now delete the original file
 		err = os.Remove(sourcePath)
 		if err != nil {
-			return 0, fmt.Errorf("Failed removing original file: %s", err)
+			return 0, fmt.Errorf("failed removing original file: %s", err)
 		}
 	}
 	return size, nil
@@ -136,7 +136,7 @@ func ParseMemSize(s string) (size int64, err error) {
 			size, err = strconv.ParseInt(s, 10, 64)
 		}
 	} else {
-		err = errors.New("Empty string")
+		err = errors.New("empty string")
 	}
 	return
 }