🐛 fix(ci): update tests for flag-only scripts

scripts/sync_standards.bat

@@ -207,6 +207,7 @@ set "AGENTS_BLOCK_START=<!-- playbook:agents:start -->"
 set "AGENTS_BLOCK_END=<!-- playbook:agents:end -->"
 set "AGENTS_BLOCK_FILE=%ROOT%\.agents_block.!RANDOM!.tmp"
 > "%AGENTS_BLOCK_FILE%" echo %AGENTS_BLOCK_START%
+>> "%AGENTS_BLOCK_FILE%" echo.
 >> "%AGENTS_BLOCK_FILE%" echo 请以 `.agents/` 下的规则为准：
 >> "%AGENTS_BLOCK_FILE%" echo.
 >> "%AGENTS_BLOCK_FILE%" echo - 入口：`.agents/index.md`

scripts/sync_standards.ps1

@@ -183,6 +183,7 @@ if ($agentsLangs.Count -eq 0) { $agentsLangs = @($AgentsNs) }
 $langsLine = ($agentsLangs | ForEach-Object { "`.agents/$_/index.md`" }) -join "、"
 $agentsBlock = @"
 <!-- playbook:agents:start -->
+
 请以 `.agents/` 下的规则为准：
 
 - 入口：`.agents/index.md`

scripts/sync_standards.sh

@@ -224,7 +224,7 @@ for name in $agents_langs; do
 done
 
 {
-  printf "%s\n" "$AGENTS_BLOCK_START"
+  printf "%s\n\n" "$AGENTS_BLOCK_START"
   printf "%s\n\n" '请以 `.agents/` 下的规则为准：'
   printf "%s\n" '- 入口：`.agents/index.md`'
   if [ -n "$langs_line" ]; then