Improve CommandInvocationError message

lib/codeql.js

@@ -38,8 +38,11 @@ const util = __importStar(require("./util"));
 const util_1 = require("./util");
 class CommandInvocationError extends Error {
     constructor(cmd, args, exitCode, error, output) {
-        super(`Failure invoking ${cmd} with arguments ${args}.\n` +
-            `Exit code ${exitCode} and error was:\n` +
+        const prettyCommand = [cmd, ...args]
+            .map((x) => (x.includes(" ") ? `'${x}'` : x))
+            .join(" ");
+        super(`Encountered a fatal error while running "${prettyCommand}".\n` +
+            `Exit code was ${exitCode} and error was:\n` +
             `${error}`);
         this.exitCode = exitCode;
         this.error = error;