Add issue link and trailing newline

Author: theotherphil

crates/ra_syntax/src/parsing/lexer.rs

@@ -150,11 +150,12 @@ pub fn classify_literal(text: &str) -> Option<Token> {
 mod tests {
     use super::*;
 
+    // https://github.com/rust-analyzer/rust-analyzer/issues/1592
     #[test]
     fn lex_float_literal() {
         assert_eq!(
             tokenize("42f64")[0],
             Token { kind: FLOAT_NUMBER, len: TextUnit::from_usize(5)}
         );
     }
-}
+}