Add end_(line|column)_number to loc pragma

[bew]

Currently the loc pragma allows to set the filename, line_number and column_number of the next token to be read by the lexer.
Its format is: #<loc:some_filename,line_number,column_number>some_token surrounded by #<loc:push> and #<loc:pop>.
So for example: #<loc:push>#<loc:"/tmp/loc.cr",22,7>SomeConst#<loc:pop>.

The lack of end numbers makes error reporting only show a ^ under the token, instead of a nice ^~~~~~~~ for the whole token.

My suggestion is to add 2 (optional?) numbers to the loc pragma to also have end_line_number and end_column_number.

I think this would be useful for #6125.

[bew]

Nevermind, when I remove #<loc:push> and #<loc:pop> it works as I expected..

Now I don't understand what these are for.. @asterite any hint?

[Sija]

Now I don't understand what these are for.. @asterite any hint?

@bew git blame it

[bew]

@Sija Good idea, thank you!
For those interested, here is the commit: d1bd2a7
(note: save & reset will later be renamed to push & pop)