Remove the explicit `https:` scheme from the Google Fonts stylesheet href in
`doc/site/template.html` to avoid mixed content warnings when the site is served
over HTTP and to allow the browser to automatically use the same protocol as the
page.
Wrap the subprocess.check_output call in a try-except block for OSError. When the interpreter binary is not found, print a user-friendly message and return None from run_trial rather than letting the exception propagate and halt the benchmark run.
Add four new counters (num_benchmark_files, num_benchmark_todos, num_benchmark_empty, num_benchmark) and a walk over the benchmark directory to count .wren files, empty/non-empty lines, and TODO patterns. Print the new benchmark section after the existing test output.
Update print statements to function syntax, add from __future__ import print_function in test.py, change shebangs to /usr/bin/env python, replace str.translate with re.sub for anchor sanitization in generate_docs.py, and decode subprocess output to utf-8 in test.py for cross-version string handling.