`{{` in App Environment Variable values break the `cf env` command

[cweibel]

Please fill out the issue checklist below and provide ALL the requested information.

• I reviewed open and closed github issues that may be related to my problem.
• I tried updating to the latest version of the CF CLI to see if it fixed my problem.
• I attempted to run the command with CF_TRACE=1 to help debug the issue.
• I am reporting a bug that others will be able to reproduce.

Describe the bug and the command you saw an issue with
I am attempting to run cf env to pull back the environment variables for an app with environment variables.

What happened
A clear and concise description of what happen.
The CLI returns back:

...
User-Provided:
TEST2: blah[]

		Something unexpected happened. This is a bug in cf.

		Please re-run the command that caused this exception with the environment
		variable CF_TRACE set to true.

		Also, please update to the latest cli and try the command again:
		https://code.cloudfoundry.org/cli/releases

		Please create an issue at: https://code.cloudfoundry.org/cli/issues

		Include the below information when creating the issue:

		Command
		cf env icu2

		CLI Version
		7.7.9+984062b.2024-03-07

		Error
		template: Display Text:1: function "blah5" not defined

Expected behavior
What should have been returned was:

User-Provided:
TEST2: blah[]
TEST3: blah{{blah5
TEST4: blah

Exact Steps To Reproduce
Steps to reproduce the behavior; include the exact CLI commands and verbose output:

Create an app manifest for any app that contains these three environment variables:

applications:
- name: icu2
  memory: 256M
  stack: cflinuxfs4
  buildpacks:
  - https://github.com/cloudfoundry/apt-buildpack/
  - https://github.com/cloudfoundry/ruby-buildpack/
  env:
    TEST2: blah[]
    TEST3: blah{{blah5
    TEST4: blah

cf push icu2
cf env icu2

Provide more context

• MacOS, iTerm2 3.4.19
• CF CLI 7.7.9+984062b.2024-03-07
• CF API 3.160.0

[cweibel]

This was found because a credhub password was generated with two { in it, I swear I wasn't trying to break this on purpose 😄

[gururajsh]

Thank you for reporting this :). I have created an entry in our tracker to look into this.