vscode: minor names and message contents changes

Author: Veetaha

editors/code/src/ctx.ts

@@ -31,7 +31,10 @@ export class Ctx {
         this.client = null;
         const client = await createClient(this.config);
         if (!client) {
-            throw new Error("Rust Analyzer Language Server is not available");
+            throw new Error(
+                "Rust Analyzer Language Server is not available. " +
+                "Please, ensure its [proper installation](https://github.com/rust-analyzer/rust-analyzer/tree/master/docs/user#vs-code)."
+            );
         }
 
         this.pushCleanup(client.start());

editors/code/src/installation/language_server.ts

@@ -72,19 +72,19 @@ export async function ensureLanguageServerBinary(
                 return langServerSource.path;
             }
             vscode.window.showErrorMessage(
-                `Unable to execute ${'`'}${langServerSource.path} --version${'`'}. ` +
-                "To use the bundled language server, set `rust-analyzer.raLspServerPath` " +
+                `Unable to run ${langServerSource.path} binary. ` +
+                "To use the pre-built language server, set `rust-analyzer.raLspServerPath` " +
                 "value to `null` or remove it from the settings to use it by default."
             );
             return null;
         }
         case BinarySource.Type.GithubRelease: {
-            const bundledBinaryPath = path.join(langServerSource.dir, langServerSource.file);
+            const prebuiltBinaryPath = path.join(langServerSource.dir, langServerSource.file);
 
-            if (!isBinaryAvailable(bundledBinaryPath)) {
+            if (!isBinaryAvailable(prebuiltBinaryPath)) {
                 const userResponse = await vscode.window.showInformationMessage(
-                    `Language server binary for rust-analyzer was not found. ` +
-                    `Do you want to download it now?`,
+                    "Language server binary for rust-analyzer was not found. " +
+                    "Do you want to download it now?",
                     "Download now", "Cancel"
                 );
                 if (userResponse !== "Download now") return null;
@@ -101,15 +101,15 @@ export async function ensureLanguageServerBinary(
 
 
                 assert(
-                    isBinaryAvailable(bundledBinaryPath),
+                    isBinaryAvailable(prebuiltBinaryPath),
                     "Downloaded language server binary is not functional"
                 );
 
                 vscode.window.showInformationMessage(
                     "Rust analyzer language server was successfully installed 🦀"
                 );
             }
-            return bundledBinaryPath;
+            return prebuiltBinaryPath;
         }
     }