replaced if guard with explicit pattern matching

Author: jogru0

src/types.rs

@@ -7,7 +7,7 @@ use tracing::debug;
 
 use crate::comment::{combine_strs_with_missing_comments, contains_comment};
 use crate::config::lists::*;
-use crate::config::{IndentStyle, StyleEdition, TypeDensity};
+use crate::config::{IndentStyle, StyleEdition, StyleEdition::*, TypeDensity};
 use crate::expr::{
     ExprType, RhsAssignKind, format_expr, rewrite_assign_rhs, rewrite_call, rewrite_tuple,
     rewrite_unary_prefix,
@@ -1297,7 +1297,7 @@ fn join_bounds_inner(
     //       or the single item is of type `Trait`,
     //          and any of the internal arrays contains more than one item;
     let retry_with_force_newline = match context.config.style_edition() {
-        style_edition if style_edition <= StyleEdition::Edition2021 => {
+        Edition2015 | Edition2018 | Edition2021 => {
             !force_newline
                 && items.len() > 1
                 && (result.0.contains('\n') || result.0.len() > shape.width)