Test keys set to empty strings

[ppalaga]

editorconfig/editorconfig#496

[cxw42]

Would it also be worth adding a testcase to parser/whitespace.in like

key= value with whitespace inside  $

($ = end of line)? That way we would expressly show the behaviour of preserving whitespace inside values. Currently we test that implicitly in comments.in, test semicolon_or_hash_in_property, but we don't have a test in the whitespace group for it.

[ppalaga]

Would it also be worth adding a testcase to parser/whitespace.in like

key= value with whitespace inside  $

($ = end of line)? That way we would expressly show the behaviour of preserving whitespace inside values. Currently we test that implicitly in comments.in, test semicolon_or_hash_in_property, but we don't have a test in the whitespace group for it.

Done in 9877f04

Could you please review again?