Improve documentation of the Density::Tall variant and remove

unnecessary condition

Author: scampi

src/config/options.rs

@@ -61,7 +61,7 @@ pub enum IndentStyle {
 pub enum Density {
     /// Fit as much on one line as possible.
     Compressed,
-    /// Use more lines.
+    /// Items are placed horizontally if sufficient space, vertically otherwise.
     Tall,
     /// Place every item on a separate line.
     Vertical,

src/lists.rs

@@ -246,10 +246,7 @@ where
     let total_sep_len = sep.len() * sep_count.saturating_sub(1);
     let real_total = total_width + total_sep_len;
 
-    if real_total <= limit
-        && !pre_line_comments
-        && !items.into_iter().any(|item| item.as_ref().is_multiline())
-    {
+    if real_total <= limit && !items.into_iter().any(|item| item.as_ref().is_multiline()) {
         DefinitiveListTactic::Horizontal
     } else {
         match tactic {