Adjusted code block spacing for improved copy-paste

[hansemro]

Fixes https://github.com/glscopeclient/scopehal-docs/issues/44

Reference: https://tex.stackexchange.com/a/300132

[hansemro]

Text will be spaced less apart to reduce unwanted space insertion. Maybe this is less readable, but at least this is more reliably copied.

[hansemro]

Before:

sudo apt install build - essential cmake pkg - config libglm - dev \
libgtkmm -3.0 - dev libsigc ++ -2.0 - dev libyaml - cpp - dev \
liblxi - dev texlive texlive - fonts - extra libglew - dev \
catch2 libvulkan - dev glslang - dev libglfw3 - dev

After:

sudo apt install build-essential cmake pkg-config libglm-dev \
libgtkmm-3.0-dev libsigc++-2.0-dev libyaml-cpp-dev \
liblxi-dev texlive texlive-fonts-extra libglew-dev \
catch2 libvulkan-dev glslang-dev libglfw3-dev

[hansemro]

The current fix does not eliminate inserted newlines on lengthy text:

wget https://sdk.lunarg.com/sdk/download/1.3.224.1/linux/vulkansdk-linux-x86_64
-1.3.224.1.tar.gz
...
sudo cp $VULKAN_SDK/etc/vulkan/explicit_layer.d/VkLayer_*.json /usr/local/share/
vulkan/explicit_layer.d

[hansemro]

Setting \lstset{breakatwhitespace=true} would prevent long text from splitting, but certain text may not fit entirely in its code block and does not insert \ for line continuation.

[hansemro]

Specified \lstset{prebreak=\textbackslash} to insert multiline breaks (\) for multiline commands. This will also split long URLs as shown for the wget command without manually inserting multiline breaks.

However, we cannot rely on listings package to always insert breaks in sensible locations (sometimes in the middle of an argument), so I had to manually insert some.

[hansemro]

This should be ready for review.