Fix two typos

Author: bjorn3

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -909,7 +909,7 @@ impl MetadataBlob {
                 _ => {
                     writeln!(
                         out,
-                        "unknown -Zls kind. allowed values are: no, all, root, lang_items, features, items"
+                        "unknown -Zls kind. allowed values are: all, root, lang_items, features, items"
                     )?;
                 }
             }

compiler/rustc_session/src/options.rs

@@ -1598,7 +1598,7 @@ options! {
         `none`, or a comma separated list of location details, for which \
         valid options are `file`, `line`, and `column` (default: `file,line,column`)"),
     ls: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
-        "decode and print various part of the crate metadata for a library crate \
+        "decode and print various parts of the crate metadata for a library crate \
         (space separated)"),
     macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
         "show macro backtraces (default: no)"),