function-parentheses-newline-inside
Require a newline or disallow whitespace on the inside of the parentheses of functions.
  a {
    transform: translate(
      1,             /* ↑ */
      1              /* ↑ */
    );               /* ↑ */
  }                  /* ↑ */
/** ↑                   ↑
 * The newline inside these two parentheses */The fix
option can automatically fix all of the problems reported by this
rule.
Options
string:
"always"|"always-multi-line"|"never-multi-line"
"always"
There must always be a newline inside the parentheses.
The following patterns are considered violations:
a { transform: translate(1, 1); }a { transform: translate(1,
  1
  ); }The following patterns are not considered violations:
a {
  transform: translate(
    1, 1
  );
}a {
  transform: translate(
    1,
    1
  );
}"always-multi-line"
There must always be a newline inside the parentheses of multi-line functions.
The following patterns are considered violations:
a { transform: translate(1,
  1) }The following patterns are not considered violations:
a { transform: translate(1, 1) }a { transform: translate( 1, 1 ) }a {
  transform: translate(
    1, 1
  );
}a {
  transform: translate(
    1,
    1
  );
}"never-multi-line"
The following patterns are considered violations:
a {
  transform: translate(
    1, 1
  );
}a {
  transform: translate(
    1,
    1
  );
}The following patterns are not considered violations:
a { transform: translate(1, 1) }a { transform: translate( 1, 1 ) }a { transform: translate(1,
  1) }