chore: fix fences errors

docs/README.md

@@ -77,14 +77,12 @@ If you prefer a formatted HTML website with search, themes, and copy buttons, bu
 ### Prerequisites
 
 ```bash
-bash
 cargo install mdbook
 ```
 
 ### Build & Serve
 
 ```bash
-bash
 # Navigate to docs directory
 cd provisioning/docs
 

scripts/fix-markdown-fences.nu

@@ -147,41 +147,15 @@ def fix-literal-newlines [content] {
     }
 }
 
-# Clean up corrupted {$detected_lang} literals and remnant text lines
+# Clean up corrupted {$detected_lang} literals only (preserve structure and blanks)
 def cleanup-corrupted-fences [content] {
-    let lines = $content | lines
+    # Only fix corrupted opening fences with {$detected_lang}
-    mut fixed_lines = []
+    # Replace them with clean ``` (without language tag so they can be detected later)
-    mut fixed_count = 0
-
-    for idx in (0..<($lines | length)) {
-        let line = $lines | get $idx
-
-        # Check for corrupted opening fence with {$detected_lang}
-        if ($line =~ '^```\{?\$detected_lang\}?$') {
-            # Replace with clean ```
-            $fixed_lines = ($fixed_lines | append '```')
-            $fixed_count += 1
-        } else {
-            # Check if this is a remnant "text" line after a language-tagged opening fence
-            let is_text_remnant = (
-                $idx > 0 and
-                ($lines | get ($idx - 1)) =~ '^```\w+' and
-                $line == 'text'
-            )
-
-            if $is_text_remnant {
-                # Skip this garbage line
-                $fixed_count += 1
-            } else {
-                # Keep the line
-                $fixed_lines = ($fixed_lines | append $line)
-            }
-        }
-    }
-
     {
-        content: ($fixed_lines | str join "\n")
+        content: ($content | str replace -a '```{$detected_lang}' '```')
-        fixed_count: $fixed_count
+        fixed_count: (
+            $content | str collect | if ($content | str contains '```{$detected_lang}') { 1 } else { 0 }
+        )
     }
 }