Bug: Parentheses inside text node are considered invalid hence expansion doesn't work

[devanshj]

div{ foo (bar) baz } should expand to <div>foo (bar) baz</div>. But currently this does not work because it's considered an invalid expression due to the following code

vscode-emmet-helper/src/emmetHelper.ts

Lines 492 to 496 in 05f8659

	// Its common for users to type (sometextinsidebrackets), this should not be treated as an abbreviation
	// Grouping in abbreviation is valid only if preceeded/succeeded with one of the symbols for nesting, sibling, repeater or climb up
	if (!/\(.*\)[>\+\*\^]/.test(abbreviation) && !/[>\+\*\^]\(.*\)/.test(abbreviation) && /\(/.test(abbreviation) && /\)/.test(abbreviation)) {
	return false;
	}

Restricting ( and ) to be only next to >, +, * or ^ misses the case where ( or) are inside { and } that is in a text node.

Actual behavior:

Expected behavior (as seen on emmet's docs):

I'll be sending a PR soon!

[roblourens]

verified ✔️