- add logic which cleans up custom placeholders with the [] syntax which were not matched

__tests__/transform.test.ts

@@ -605,7 +605,7 @@ it('Extract custom placeholder from PR body and replace in global template', asy
       }
     }
   ]
-  customConfig.template = "${{CHANGELOG}}\n\n${{C_PLACEHOLER_2[2]}}\n\n${{C_PLACEHOLER_2[*]}}"
+  customConfig.template = "${{CHANGELOG}}\n\n${{C_PLACEHOLER_2[2]}}\n\n${{C_PLACEHOLER_2[*]}}${{C_PLACEHOLDER_1[7]}}${{C_PLACEHOLER_2[1493]}}"
   customConfig.pr_template = "${{BODY}} ---->  ${{C_PLACEHOLDER_1}}"
 
   const resultChangelog = buildChangelog(DefaultDiffInfo, mergedPullRequests, {

dist/index.js

@@ -1648,6 +1648,7 @@ function buildChangelog(diffInfo, prs, options) {
     let transformedChangelog = config.template || configuration_1.DefaultConfiguration.template;
     transformedChangelog = replacePlaceholders(transformedChangelog, placeholderMap, placeholders, placeholderPrMap);
     transformedChangelog = replacePrPlaceholders(transformedChangelog, placeholderPrMap);
+    transformedChangelog = cleanupPrPlaceHolders(transformedChangelog, placeholders);
     core.info(`ℹ️ Filled template`);
     return transformedChangelog;
 }
@@ -1733,6 +1734,15 @@ function replacePrPlaceholders(template, placeholderPrMap /* map with all pr rel
     }
     return transformed;
 }
+function cleanupPrPlaceHolders(template, placeholders /* placeholders to apply */) {
+    let transformed = template;
+    for (const [, phs] of placeholders) {
+        for (const ph of phs) {
+            transformed = transformed.replaceAll(new RegExp(`\\$\\{\\{${ph.name}\\[.+?\\]\\}\\}`, 'gu'), '');
+        }
+    }
+    return transformed;
+}
 function transform(filled, transformers) {
     if (transformers.length === 0) {
         return filled;

src/transform.ts

@@ -255,6 +255,7 @@ export function buildChangelog(diffInfo: DiffInfo, prs: PullRequestInfo[], optio
   let transformedChangelog = config.template || DefaultConfiguration.template
   transformedChangelog = replacePlaceholders(transformedChangelog, placeholderMap, placeholders, placeholderPrMap)
   transformedChangelog = replacePrPlaceholders(transformedChangelog, placeholderPrMap)
+  transformedChangelog = cleanupPrPlaceHolders(transformedChangelog, placeholders)
   core.info(`ℹ️ Filled template`)
   return transformedChangelog
 }
@@ -361,6 +362,19 @@ function replacePrPlaceholders(
   return transformed
 }
 
+function cleanupPrPlaceHolders(
+  template: string,
+  placeholders: Map<string, Placeholder[]> /* placeholders to apply */
+): string {
+  let transformed = template
+  for (const [, phs] of placeholders) {
+    for (const ph of phs) {
+      transformed = transformed.replaceAll(new RegExp(`\\$\\{\\{${ph.name}\\[.+?\\]\\}\\}`, 'gu'), '')
+    }
+  }
+  return transformed
+}
+
 function transform(filled: string, transformers: RegexTransformer[]): string {
   if (transformers.length === 0) {
     return filled