Qual: fix phan notices

[mdeweerd]

Qual: fix phan notices

Fix phan/phpstan notices, mostly in html,formmail

[mdeweerd]

@eldy
I leave it to you to fix this phan notice.

dolibarr/htdocs/core/class/html.formmail.class.php

Lines 957 to 959 in 235d23a

	foreach ($this->substit_lines as $substit_line) {
	$lines .= make_substitutions($defaultlines, $substit_line)."\n";
	}

Parameter #2 $substitutionarray of function make_substitutions expects array<string, string>, string given.