ci/docs: stabilize validator (quote backticks; remove brittle code-block syntax check; use pre-increments)

scripts/validation/validate-docs.sh

@@ -160,18 +160,15 @@ check_code_examples() {
     ((++CHECKS))
 
     # Find Kotlin code blocks and check basic syntax
-    kotlin_blocks=$(grep -r "```kotlin" docs/ | wc -l)
+    kotlin_blocks=$(grep -r '```kotlin' docs/ | wc -l)
     if [ "$kotlin_blocks" -gt 0 ]; then
         log_success "Found $kotlin_blocks Kotlin code examples"
     else
         log_warning "No Kotlin code examples found in documentation"
     fi
 
-    # Check for common syntax issues in code blocks
-    syntax_issues=$(grep -A 10 "```kotlin" docs/**/*.md | grep -E "(fun|class|interface)" | grep -v ":" | head -5 || true)
-    if [ -n "$syntax_issues" ]; then
-        log_warning "Potential syntax issues in code examples (manual review recommended)"
-    fi
+    # Skipping code block syntax checks to avoid false positives in CI
+    true
 }
 
 # Check documentation completeness score
@@ -214,7 +211,7 @@ link_check() {
 # Optional PlantUML render check
 plantuml_check() {
     log_info "Rendering PlantUML diagrams to validate syntax (if 'plantuml' is available)..."
-    ((CHECKS++))
+    ((++CHECKS))
     if command -v plantuml &> /dev/null; then
         # Render to SVG; failures should surface as non-zero exit
         # Note: This may produce SVGs next to the .puml files in CI workspace