Improve debugAdapterEnv's regex

Author: royitaqi

lldb/tools/lldb-dap/package.json

@@ -422,7 +422,7 @@
                     "markdownDescription": "Additional environment variables to set when launching the debug adapter executable. E.g. `[\"FOO=1\", \"BAR\"]`",
                     "items": {
                       "type": "string",
-                      "pattern": "^((\\w+=.*)|^\\w+)$"
+                      "pattern": "^\\w+(=.*)?$"
                     },
                     "default": []
                   }
@@ -689,7 +689,7 @@
                     "markdownDescription": "Additional environment variables to set when launching the debug adapter executable. E.g. `[\"FOO=1\", \"BAR\"]`",
                     "items": {
                       "type": "string",
-                      "pattern": "^((\\w+=.*)|^\\w+)$"
+                      "pattern": "^\\w+(=.*)?$"
                     },
                     "default": []
                   }

lldb/tools/lldb-dap/src-ts/debug-adapter-factory.ts

@@ -92,7 +92,7 @@ function validateDAPEnv(debugConfigEnv: any): boolean {
     Array.isArray(debugConfigEnv) &&
     debugConfigEnv.findIndex(
       (entry) =>
-        typeof entry !== "string" || !/^((\\w+=.*)|^\\w+)$/.test(entry),
+        typeof entry !== "string" || !/^\w+(=.*)?$/.test(entry),
     ) !== -1
   ) {
     return false;