[bug] Missing characters character on windows

[stallman-cui]

Hi, thank you, when i use this on windows, it does not work like normal, may be a bug
OS: windows 7
OS default coding: koi8-r
test file: test.log, this log just have two words, and no line breaks
content: test result
expect: test result
but result is: test resul

after read the source code, i found this is a bug when it work on windows

When i update this line

data = self.fp.read(end_pos - self.fp.tell() - 1)

to

data = self.fp.read(end_pos - self.fp.tell())

it works like expect

[six8]

This is probably an issue with line endings. Windows normally uses \r\n and Linux uses \n. Will need to modify this so it supports either.