Remove carriage return from candidates.

[whatacold]

Hi,

In Cygwin, every candidate contains a carriage return, shown as ^M, at the end when doing counsel-gtags-dwim, so that no result will be matched by selecting any candidate. The minibuffer looks like below:

2 Find Definition:
Foo^M
Bar^M

Using global in both shells of Cygwin and Linux with the exactly same tag files indicates that the output in Cygwin contains an additional CR. Cygwin:

$ global --result=grep -c | head | hexdump -C | head -n 2
00000000  41 42 53 54 52 41 43 54  0d 0a 41 43 43 4f 55 4e  |ABSTRACT..ACCOUN|
00000010  54 5f 41 55 54 48 5f 54  59 50 45 0d 0a 41 44 55  |T_AUTH_TYPE..ADU|

Linux:

$ global --result=grep -c | head | hexdump -C | head -n 2
00000000  41 42 53 54 52 41 43 54  0a 41 43 43 4f 55 4e 54  |ABSTRACT.ACCOUNT|
00000010  5f 41 55 54 48 5f 54 59  50 45 0a 41 44 55 4c 54  |_AUTH_TYPE.ADULT|

This PR fixes it by simply replacing every \r\n with \n.

[syohex]

Sorry this package is no longer maintained. If you have an issue, please send it to https://github.com/FelipeLema/emacs-counsel-gtags