more spelling fixes

src/machine/dispatch.rs

@@ -1623,7 +1623,7 @@ impl Machine {
                 }
 
                 let Some(inst) = self.code.get(self.machine_st.p) else {
-                    // a seperate function marked #[cold] to make the compiler/branch-predictor prefer the happy path
+                    // a separate function marked #[cold] to make the compiler/branch-predictor prefer the happy path
                     handle_code_index_oob(self.code.len(), self.machine_st.p);
                 };
 
@@ -6038,7 +6038,7 @@ impl Machine {
     }
 }
 
-#[cold] // this is a seperate function so that we can annotate it as cold
+#[cold] // this is a separate function so that we can annotate it as cold
 #[track_caller]
 fn handle_code_index_oob(code_len: usize, p: usize) -> ! {
     panic!("code pointer p = {p} is oob for code area of size {code_len}");

src/parser/char_reader.rs

@@ -206,7 +206,7 @@ impl<R: Read> CharRead for CharReader<R> {
             // i.e. the content of buf is a prefix of a valid utf-8 encoded char
             //
             // we need to read more data from the underlying stream
-            // so that we can determin its validity
+            // so that we can determine its validity
 
             if self.buf.len() > 4 {
                 // keep a prefix of 4 bytes so that we can put back at least one char
@@ -218,7 +218,7 @@ impl<R: Read> CharRead for CharReader<R> {
                 Err(e) => return Some(Err(e)),
                 Ok(0) => return Some(Err(bad_bytes_error(&self.buf))),
                 Ok(_) => {
-                    // successfully filled the buffer with another chuck of data
+                    // successfully filled the buffer with another chunk of data
                 }
             }
         }