Anya Xiao

Updated the codelab to reflect changes in dependency management with Puku, including renaming and clarifying instructions for adding, updating, and removing Go third-party dependencies.

Update please codelab except 3rd party dependencies, which were updated in another PR.

Refactor brace handling in strFormat()

1

## Problem The `str.format()` function in Please was not properly handling escaped braces (`{{` and `}}`), which should be converted to single braces (`{` and `}`) according to Python's standard...