fix comment typo, `CodeSuggestion` path in doc comment

`CodeSuggestion` doesn't live in the `diagnostic` module.

src/librustc_errors/diagnostic.rs

@@ -208,7 +208,7 @@ pub fn span_help<S: Into<MultiSpan>>(&mut self,
     /// Prints out a message with a suggested edit of the code. If the suggestion is presented
     /// inline it will only show the text message and not the text.
     ///
-    /// See `diagnostic::CodeSuggestion` for more information.
+    /// See `CodeSuggestion` for more information.
     pub fn span_suggestion_short(&mut self, sp: Span, msg: &str, suggestion: String) -> &mut Self {
         self.suggestions.push(CodeSuggestion {
             substitution_parts: vec![Substitution {
@@ -235,7 +235,7 @@ pub fn span_suggestion_short(&mut self, sp: Span, msg: &str, suggestion: String)
     /// * may look like "to do xyz, use" or "to do xyz, use abc"
     /// * may contain a name of a function, variable or type, but not whole expressions
     ///
-    /// See `diagnostic::CodeSuggestion` for more information.
+    /// See `CodeSuggestion` for more information.
     pub fn span_suggestion(&mut self, sp: Span, msg: &str, suggestion: String) -> &mut Self {
         self.suggestions.push(CodeSuggestion {
             substitution_parts: vec![Substitution {

src/librustc_errors/emitter.rs

@@ -48,7 +48,7 @@ fn emit(&mut self, db: &DiagnosticBuilder) {
                sugg.substitution_parts[0].substitutions[0].find('\n').is_none() {
                 let substitution = &sugg.substitution_parts[0].substitutions[0];
                 let msg = if substitution.len() == 0 || !sugg.show_code_when_inline {
-                    // This substitution is only removal or we explicitely don't want to show the
+                    // This substitution is only removal or we explicitly don't want to show the
                     // code inline, don't show it
                     format!("help: {}", sugg.msg)
                 } else {