no-trailing-spaces: Fix produces wrong results for windows style line endings

[gyandeeps]

Eslint: 1.6
Parser: default

Code:

            "var short2 = true;\r\n" +
            "\r\n" +
            "module.exports = {\r\n" +
            "  short: short,    \r\n" +
            "  short2: short\r\n" +
            "}\r\n"

Output:

            "var short2 = true;\r\n" +
            "\r\n" +
            "module.exports = {\r\n" +
            "  short: sho   \r\n" +   //----> this is where the issue is
            "  short2: short\r\n" +
            "}\r\n"

The above code is from existing unit test with \n: https://github.com/eslint/eslint/blob/master/tests/lib/rules/no-trailing-spaces.js#L69

FYI, the above code works fine if you have \n line endings.

Findings:
This is happening because \n occupies one spot on the source code array vs \r\n occupies 2 spots. So when the fixes are calculated by the rule, it only considers one spot of line ending by default.