allow to use the extension in folders that contain spaces

src/client.ts

@@ -433,20 +433,20 @@ export default class Client implements ClientInterface {
     // If a custom Gemfile was configured outside of the project, use that. Otherwise, prefer our custom bundle over the
     // app's bundle
     if (customBundleGemfile.length > 0) {
-      bundleGemfile = `BUNDLE_GEMFILE=${customBundleGemfile}`;
+      bundleGemfile = `BUNDLE_GEMFILE="${customBundleGemfile}"`;
     } else if (
       fs.existsSync(path.join(this.workingFolder, ".ruby-lsp", "Gemfile"))
     ) {
-      bundleGemfile = `BUNDLE_GEMFILE=${path.join(
+      bundleGemfile = `BUNDLE_GEMFILE="${path.join(
         this.workingFolder,
         ".ruby-lsp",
         "Gemfile",
-      )}`;
+      )}"`;
     } else {
-      bundleGemfile = `BUNDLE_GEMFILE=${path.join(
+      bundleGemfile = `BUNDLE_GEMFILE="${path.join(
         this.workingFolder,
         "Gemfile",
-      )}`;
+      )}"`;
     }
 
     const result = await asyncExec(

src/ruby.ts

@@ -214,7 +214,7 @@ export class Ruby {
       );
     }
 
-    this._env.BUNDLE_GEMFILE = absoluteBundlePath;
+    this._env.BUNDLE_GEMFILE = `"${absoluteBundlePath}"`;
   }
 
   private async readRubyVersion() {