style: include unnecessary_join (TheAlgorithms#752)

Author: vil02

Cargo.toml

@@ -75,7 +75,6 @@ stable_sort_primitive = { level = "allow", priority = 1 }
 too_many_lines = { level = "allow", priority = 1 }
 trivially_copy_pass_by_ref = { level = "allow", priority = 1 }
 unnecessary_box_returns = { level = "allow", priority = 1 }
-unnecessary_join = { level = "allow", priority = 1 }
 unnecessary_wraps = { level = "allow", priority = 1 }
 unnested_or_patterns = { level = "allow", priority = 1 }
 unreadable_literal = { level = "allow", priority = 1 }

src/ciphers/morse_code.rs

@@ -96,11 +96,7 @@ fn _decode_token(string: &str) -> String {
 }
 
 fn _decode_part(string: &str) -> String {
- string
- .split(' ')
- .map(_decode_token)
- .collect::<Vec<String>>()
- .join("")
+ string.split(' ').map(_decode_token).collect::<String>()
 }
 
 /// Convert morse code to ascii.