refactor: clippy::else_if_without_else (#974)

Cargo.toml

@@ -77,6 +77,7 @@ wildcard_imports = "allow"
 
 # nursery or restricted
 deref_by_slicing = "warn"
+else_if_without_else = "warn"
 empty_line_after_doc_comments = "warn"
 equatable_if_let = "warn"
 missing_const_for_fn = "warn"

src/widgets/reflow.rs

@@ -189,6 +189,9 @@ where
                             wrapped_lines.push(vec![]);
                         } else if !self.trim || !current_line.is_empty() {
                             current_line.extend(unfinished_whitespaces.into_iter());
+                        } else {
+                            // TODO: explain why this else branch is ok.
+                            // See clippy::else_if_without_else
                         }
                         current_line.append(&mut unfinished_word);
                     }