Fix clippy warnings

clippy 0.1.78 no longer likes using multiple locations for trait
bounds (lint `multiple_bound_locations`).

lexpr/src/parse/read.rs

@@ -369,13 +369,13 @@ impl<'a> SliceRead<'a> {
         position
     }
 
-    fn parse_symbol_bytes<'s, T: ?Sized, F>(
+    fn parse_symbol_bytes<'s, T, F>(
         &'s mut self,
         scratch: &'s mut Vec<u8>,
         result: F,
     ) -> Result<Reference<'a, 's, T>>
     where
-        T: 's,
+        T: ?Sized + 's,
         F: for<'f> FnOnce(&'s Self, &'f [u8]) -> Result<&'f T>,
     {
         // Index of the first byte not yet copied into the scratch space.
@@ -486,13 +486,13 @@ impl<'a> SliceRead<'a> {
     /// The big optimization here over IoRead is that if the string contains no
     /// backslash escape sequences, the returned &str is a slice of the raw
     /// S-expression data so we avoid copying into the scratch space.
-    fn parse_r6rs_str_bytes<'s, T: ?Sized, F>(
+    fn parse_r6rs_str_bytes<'s, T, F>(
         &'s mut self,
         scratch: &'s mut Vec<u8>,
         result: F,
     ) -> Result<Reference<'a, 's, T>>
     where
-        T: 's,
+        T: ?Sized + 's,
         F: for<'f> FnOnce(&'s Self, &'f [u8]) -> Result<&'f T>,
     {
         // Index of the first byte not yet copied into the scratch space.