chore(solc): include error code in diagnostic

ethers-solc/src/artifacts/mod.rs

@@ -1233,8 +1233,18 @@ impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         if let Some(msg) = &self.formatted_message {
             match self.severity {
-                Severity::Error => msg.as_str().red().fmt(f),
-                Severity::Warning | Severity::Info => msg.as_str().yellow().fmt(f),
+                Severity::Error => {
+                    if let Some(code) = self.error_code {
+                        format!("error[{}]: ", code).as_str().red().fmt(f)?;
+                    }
+                    msg.as_str().red().fmt(f)
+                }
+                Severity::Warning | Severity::Info => {
+                    if let Some(code) = self.error_code {
+                        format!("warning[{}]: ", code).as_str().yellow().fmt(f)?;
+                    }
+                    msg.as_str().yellow().fmt(f)
+                }
             }
         } else {
             self.severity.fmt(f)?;

ethers-solc/src/compile/output.rs

@@ -354,7 +354,9 @@ impl AggregatedCompilerOutput {
 /// Helper type to implement display for solc errors
 #[derive(Clone, Debug)]
 pub struct OutputDiagnostics<'a> {
+    /// output of the compiled project
     compiler_output: &'a AggregatedCompilerOutput,
+    /// the error codes to ignore
     ignored_error_codes: &'a [u64],
 }