function-parentheses-space-inside
Require a single space or disallow whitespace on the inside of the parentheses of functions.
a { transform: translate( 1, 1 ); }
/**                     ↑      ↑
 * The space inside these two parentheses */The fix
option can automatically fix all of the problems reported by this
rule.
Options
string:
"always"|"never"|"always-single-line"|"never-single-line"
"always"
There must always be a single space inside of 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 ); }"never"
There must never be whitespace on the inside of 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); }"always-single-line"
There must always be a single space inside the parentheses of single-line functions.
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
  )
}"never-single-line"
There must never be whitespace inside the parentheses of single-line functions.
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
  )
}