chore: fix fences errors

docs/README.md

@@ -135,4 +135,4 @@ All documentation is standard GitHub Flavored Markdown. You can:
 - **Looking for API docs** → See [API Reference](src/api-reference/)
 - **Want architecture details** → Read [Architecture Overview](src/architecture/architecture-overview.md)
 
-For complete navigation, see [Table of Contents](src/SUMMARY.md).
+For complete navigation, see [Table of Contents](src/SUMMARY.md).

scripts/fix-markdown-fences.nu

@@ -68,7 +68,7 @@ def main [
 
         # Phase 0: Fix literal \n escape sequences (Nushell - SAFE)
         if ($phase == "newlines" or $phase == "all") {
-            if ($modified_content | str contains '\\n') {
+            if ($modified_content | str contains '\n') {
                 let newlines_result = fix-literal-newlines $modified_content
                 $newlines_fixed = $newlines_result.fixed_count
                 $total_newlines_fixed += $newlines_fixed
@@ -142,20 +142,18 @@ def main [
 # Fix literal \n escape sequences → actual newlines
 def fix-literal-newlines [content] {
     {
-        content: ($content | str replace -a '\\n' "\n")
+        content: ($content | str replace -a '\n' "\n")
         fixed_count: 1
     }
 }
 
 # Clean up corrupted {$detected_lang} literals only (preserve structure and blanks)
 def cleanup-corrupted-fences [content] {
-    # Only fix corrupted opening fences with {$detected_lang}
-    # Replace them with clean ``` (without language tag so they can be detected later)
+    let had_corruption = $content | str contains '```{$detected_lang}'
+    let fixed_content = $content | str replace -a '```{$detected_lang}' '```'
     {
-        content: ($content | str replace -a '```{$detected_lang}' '```')
-        fixed_count: (
-            $content | str collect | if ($content | str contains '```{$detected_lang}') { 1 } else { 0 }
-        )
+        content: $fixed_content
+        fixed_count: (if $had_corruption { 1 } else { 0 })
     }
 }