fix(fmt): keep if stmts inline in assembly blocks

[0xrusowsky]

Motivation

when running the new formatter on solady, we realized that if stmts in assembly blocks where sometimes broken when they shouldn't

@@ -692,7 +692,10 @@ library J50NParserLib {
 if eq(chr(_p0ut), 46) { _pout := skip0To9s(add(_pout, 1), end, 1) } // '.'.
 let t_ := mload(_pout)
 // 'E', 'e'.
- if eq(or(0x20, byte(0, t_)), 101) {
+ if eq(
+     or(0x20, byte(0, t_)),
+     101
+ ) {
    // forgefmt: disable-next-item

i tracked down 2 different root-causes:

1. space left isn't always accurate
2. inline disable would sometimes prevent breaks

Solution

• for point 1, i introduced:

/// Computes the maximum space left given the context information available:
/// `block_depth`, `tab_width`, and a user-defined unavailable size `prefix_len`.
fn max_space_left(&self, prefix_len: usize) -> usize {
    self.config
        .line_length
        .saturating_sub(self.block_depth * self.config.tab_width + prefix_len)
}

• for point 2, i used a "hardbreak" rather than a "space" when we know there is an inline disable cmnt

• additionally, i changed word() to print_word() to update the counter in assembly blocks

PR Checklist

• Added Tests
• Added Documentation
• Breaking changes