fix broken file reading

Signed-off-by: kim (grufwub) <grufwub@gmail.com>

core/filesystem.go

@@ -122,9 +122,8 @@ func (fs *FileSystemObject) ReadFile(fd *os.File) ([]byte, Error) {
 			}
 		}
 
-		// Add current line to return slice, skip
+		// Add current line to return slice
-		// final byte which is '\n'
+		ret = append(ret, line...)
-		ret = append(ret, line[:len(line)-1]...)
 	}
 
 	// Return!