Fix capitalization of lint message

Author: A-Walrus

clippy_lints/src/slice_as_bytes.rs

@@ -44,7 +44,7 @@ impl<'tcx> LateLintPass<'tcx> for SliceAsBytes {
                         let range = snippet_with_applicability(cx,index.span,"..",&mut applicability);
                         let sugg = format!("&{stringish}.as_bytes()[{range}]");
                         let type_name = if is_str {"str"} else {"String"};
-                        let msg = format!("Slicing a {type_name} before calling `as_bytes` results in needless UTF-8 alignment checks, and has the possiblity of panicking");
+                        let msg = format!("slicing a {type_name} before calling `as_bytes` results in needless UTF-8 alignment checks, and has the possiblity of panicking");
                         let sp = expr.span;
                         span_lint_and_sugg(cx,SLICE_AS_BYTES ,sp , &msg, "try",sugg ,applicability);
                     }

tests/ui/slice_as_bytes.stderr

@@ -1,18 +1,18 @@
-error: Slicing a str before calling `as_bytes` results in needless UTF-8 alignment checks, and has the possiblity of panicking
+error: slicing a str before calling `as_bytes` results in needless UTF-8 alignment checks, and has the possiblity of panicking
   --> $DIR/slice_as_bytes.rs:9:17
    |
 LL |     let bytes = s[1..5].as_bytes();
    |                 ^^^^^^^^^^^^^^^^^^ help: try: `&s.as_bytes()[1..5]`
    |
    = note: `-D clippy::slice-as-bytes` implied by `-D warnings`
 
-error: Slicing a String before calling `as_bytes` results in needless UTF-8 alignment checks, and has the possiblity of panicking
+error: slicing a String before calling `as_bytes` results in needless UTF-8 alignment checks, and has the possiblity of panicking
   --> $DIR/slice_as_bytes.rs:10:17
    |
 LL |     let bytes = string[1..].as_bytes();
    |                 ^^^^^^^^^^^^^^^^^^^^^^ help: try: `&string.as_bytes()[1..]`
 
-error: Slicing a str before calling `as_bytes` results in needless UTF-8 alignment checks, and has the possiblity of panicking
+error: slicing a str before calling `as_bytes` results in needless UTF-8 alignment checks, and has the possiblity of panicking
   --> $DIR/slice_as_bytes.rs:11:17
    |
 LL |     let bytes = "consectetur adipiscing"[..=5].as_bytes();