Improve some names.

nnethercote · nnethercote · commit 101bc225d881 · 2023-12-23T13:23:28.000+11:00
Lots of vectors of messages called `message` or `msg`. This commit
pluralizes them.

Note that `emit_message_default` and `emit_messages_default` both
already existed, and both process a vector, so I renamed the former
`emit_messages_default_inner` because it's called by the latter.
diff --git a/src/parse/session.rs b/src/parse/session.rs
@@ -370,7 +370,7 @@ mod tests {
 
         fn build_diagnostic(level: DiagnosticLevel, span: Option<MultiSpan>) -> Diagnostic {
             let mut diag = Diagnostic::new(level, "");
-            diag.message.clear();
+            diag.messages.clear();
             if let Some(span) = span {
                 diag.span = span;
             }

Original file line number	Diff line number	Diff line change
`@@ -370,7 +370,7 @@ mod tests {`
`370`	`370`
`371`	`371`	`fn build_diagnostic(level: DiagnosticLevel, span: Option<MultiSpan>) -> Diagnostic {`
`372`	`372`	`let mut diag = Diagnostic::new(level, "");`
`373`		`- diag.message.clear();`
	`373`	`+ diag.messages.clear();`
`374`	`374`	`if let Some(span) = span {`
`375`	`375`	`diag.span = span;`
`376`	`376`	`}`