build: update newline handling

Author: Planeshifter

.github/workflows/update_error_databases.yml

@@ -118,7 +118,10 @@ jobs:
           body="This PR\n\n-   updates the error databases\n\nThe following error codes were added:\n\n${table}"
           
           # Add the comment body to the workflow output after escaping to render newlines:
-          body="${body//\\n/'%0A'}"
+          body="${body//\\n/$'\n'}"
+          body="${body//'%'/'%25'}"
+          body="${body//$'\n'/'%0A'}"
+          body="${body//$'\r'/'%0D'}"
           echo "body=${body}" >> $GITHUB_OUTPUT
 
       # Disable Git hooks:

lib/node_modules/@stdlib/error/tools/database/scripts/build.js

@@ -214,7 +214,7 @@ function main() {
 		'flag': 'a' // Append to existing file
 	};
 	keys = objectKeys( data );
-	csv = '';
+	csv = '\n';
 	for ( i = 0; i < keys.length; i++ ) {
 		key = keys[ i ];
 		csv += '"' + key + '","' + escapeQuotes( data[ key ] ) + '","' + types[ key ] + '"\n'; // Note: ensures trailing newline