Sweep: Remove x-hack from grub, nanopim4 and shellcheck scripts

[sweep-nightly[bot]]

• In packages/blobs/grub/09_linux_with_dtb.sh, replace all instances of 'x$var' with '$var'.
• In packages/bsp/nanopim4/nanopim4-pwm-fan.sh, replace all instances of 'x$var' with '$var'.
• In lib/tools/shellcheck.sh, replace all instances of 'x$var' with '$var'.

Parent issue: #11

Checklist

- [X] `packages/bsp/nanopim4/nanopim4-pwm-fan.sh` ✅ Commit [`a64e22e`](https://github.com/kevinlu1248/armbian-build/commit/a64e22ec2427d077e7f6ec86b94cb9ee494ddbe8)

• Replace all instances of 'x$var' with '$var'.

- [X] `packages/blobs/grub/09_linux_with_dtb.sh` ✅ Commit [`6f6a113`](https://github.com/kevinlu1248/armbian-build/commit/6f6a1139356d6b52a056fba57dee2a75283ec3a7)

• Replace all instances of 'x$var' with '$var'.

- [X] `lib/tools/shellcheck.sh` ❌ Failed

• Replace all instances of 'x$var' with '$var'.

[sweep-nightly[bot]]

Here's the PR! https://github.com/kevinlu1248/armbian-build/pull/47.

💎 Sweep Pro: I used GPT-4 to create this ticket. You have unlimited GPT-4 tickets.

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Actions (click)

• [ ] ↻ Restart Sweep

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Step 1: 🔎 Searching

I found the following snippets in your repository. I will now analyze these snippets and come up with a plan.

Some code snippets I looked at (click to expand). If some file is missing from here, you can mention the path in the ticket description.

https://github.com/kevinlu1248/armbian-build/blob/e13c915efd6b71179224c064bd1c07fbbcb8b81b/packages/bsp/nanopim4/nanopim4-pwm-fan.sh#L1-L487 https://github.com/kevinlu1248/armbian-build/blob/e13c915efd6b71179224c064bd1c07fbbcb8b81b/packages/blobs/grub/09_linux_with_dtb.sh#L1-L455 https://github.com/kevinlu1248/armbian-build/blob/e13c915efd6b71179224c064bd1c07fbbcb8b81b/lib/tools/shellcheck.sh#L1-L146

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Step 2: ⌨️ Coding

• [X] packages/bsp/nanopim4/nanopim4-pwm-fan.sh ✅ Commit a64e22e

  • Replace all instances of 'x$var' with '$var'.

• [X] packages/blobs/grub/09_linux_with_dtb.sh ✅ Commit 6f6a113

  • Replace all instances of 'x$var' with '$var'.

• [X] lib/tools/shellcheck.sh ❌ Failed

  • Replace all instances of 'x$var' with '$var'.

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Step 3: 🔁 Code Review

I have finished reviewing the code for completeness. I did not find errors for sweep/remove-x-hack_5.

.

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