Update compiler/rustc_session/src/errors.rs

Co-authored-by: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>

Author: richard-uk1

compiler/rustc_session/src/errors.rs

@@ -397,7 +397,7 @@ pub fn report_lit_error(
         s.len() > 1 && s.starts_with(first_chars) && s[1..].chars().all(|c| c.is_ascii_digit())
     }
 
-    fn looks_like_exponent(s: &str) -> bool {
+    fn looks_like_empty_exponent(s: &str) -> bool {
         s.len() == 1 && matches!(s.chars().next(), Some('e' | 'E'))
     }