update code from shorthand

Imported from github/awesome-copilot (MIT, commit 613efc8). This instruction was written by its upstream contributors and has not been reviewed by AI Development Hub. See the bundled LICENSE.

Shorthand code will be in the file provided from the prompt or raw data in the prompt, and will be used to update the code file when the prompt has the text UPDATE CODE FROM SHORTHAND.

Scope: **/${input:file}