fix(plugin-legacy): syntax error in variable detectModernBrowserCode (#15095)

Author: jiadesen

packages/plugin-legacy/README.md

@@ -164,7 +164,7 @@ The current values are:
 
 - `sha256-MS6/3FCg4WjP9gwgaBGwLpRCY6fZBgwmhVCdrPrNf3E=`
 - `sha256-tQjf8gvb2ROOMapIxFvFAYBeUJ0v1HCbOcSmDNXGtDo=`
-- `sha256-6gxDO54HJkJNWi7H6ipFpWWSkWSRpyuZYMGDyG6bcNE=`
+- `sha256-VA8O2hAdooB288EpSTrGLl7z3QikbWU9wwoebO/QaYk=`
 - `sha256-+5XkZFazzJo8n0iOP4ti/cLCMUudTf//Mzkb7xNPXIc=`
 
 <!--

packages/plugin-legacy/src/snippets.ts

@@ -8,7 +8,7 @@ export const systemJSInlineCode = `System.import(document.getElementById('${lega
 
 const detectModernBrowserVarName = '__vite_is_modern_browser'
 export const detectModernBrowserDetector = `import.meta.url;import("_").catch(()=>1);(async function*(){})().next()`
-export const detectModernBrowserCode = `${detectModernBrowserDetector}if(location.protocol!="file:"){window.${detectModernBrowserVarName}=true}`
+export const detectModernBrowserCode = `${detectModernBrowserDetector};if(location.protocol!="file:"){window.${detectModernBrowserVarName}=true}`
 export const dynamicFallbackInlineCode = `!function(){if(window.${detectModernBrowserVarName})return;console.warn("vite: loading legacy chunks, syntax error above and the same error below should be ignored");var e=document.getElementById("${legacyPolyfillId}"),n=document.createElement("script");n.src=e.src,n.onload=function(){${systemJSInlineCode}},document.body.appendChild(n)}();`
 
 export const modernChunkLegacyGuard = `export function __vite_legacy_guard(){${detectModernBrowserDetector}};`