antlr/antlr4 — pull request #738 by michaelpj (2014-10-14 11:45:57+00:00)
Title: Fix character offsets for EOFs after newlines

EOFs after a token containing newlines currently get the wrong positions.

For example, for a grammar containing the following lexer rules:
```
Digit : [ 0-9 ] ;
WS : [ \t\r\n ]+ ;
```
and input `1234\n`, the EOF token has line 2, but it's `charPositionInLine` is 5, rather than 0. That is, it claims to be on the new line, but at a character offset corresponding to the end of the previous line.

The fix is a straightforward check in `Lexer.emitEOF` to only update the char position in the line if the current line is the same as that of the previous token.