Terminal command decorations: Same command repeated gets no decoration

[joaomoreno]

Testing #143433

1. Enable terminal.integrated.shellIntegration.enabled
2. Type a command, hit Enter
3. Type the same command, hit Enter

🐛 Every repeated execution after the first gets no decoration

[Tyriar]

@joaomoreno what shell was this using?

[joaomoreno]

Bash, straight out of a fresh Ubuntu 18.04 installation.

[Tyriar]

This is happening because bash's history on Linux seems to behave differently and merge entries unlike on macOS.

bash v5.1.4 on wsl:

bash v5.1.8 on macOS:

[Tyriar]

I worked around the issue so it should be fixed, it will still fail when the exit code changes which should be a very rare occurrence. That's a more invasive change which we'll handle next month as the shell scripts are quite fragile and changes to the protocol need to be applied to the pwsh/zsh scripts as well.