Update docs (mostly), fixes, etc

docs/parts/reference/style/spacing.tex

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+\subsubsection{Spacing}
+For spacing in math mode, prefer using the methods described \hlhref{https://www.overleaf.com/learn/latex/Spacing_in_math_mode}{here},
+for vertical spacing prefer the commands described below
+\begin{itemize}
+    \item \verb|\smallhspace| Prints a 2mm hspace
+    \item \verb|\mediumhspace| Prints a 5mm hspace
+    \item \verb|\largehspace| Prints a 10mm = 1cm hspace
+    \item \verb|\rmvspace|[\textit{number}] Removes an amount of vertical space. Should not be used unless can be avoided with general settings. Defaults to 0.5
+\end{itemize}
+
+Vertical spacing config for the entire document. By default, the \LaTeX\ defaults are used.
+\begin{itemize}
+    \item \verb|\noverticalspacing|
+    \item \verb|\smallverticalspacing|
+    \item \verb|\mediumverticalspacing| (approximately the same as the \LaTeX defaults)
+    \item \verb|\largeverticalspacing|
+\end{itemize}
+You are of course free to redefine commands like \verb|\parskip|, etc to your liking, these commands are just provided for your convenience.
+See \hlhref{https://www.overleaf.com/learn/latex/\%5Cabovedisplayskip_and_related_commands}{here}\ for more details
+and \hlhref{https://latex-tutorial.com/latex-space/}{here for a good guide on spacing}.
+
+To control paragraph spacing, see \hlhref{https://mirror.ox.ac.uk/sites/ctan.org/macros/latex/contrib/parskip/parskip.pdf}{here}\ 
+and \hlhref{https://www.overleaf.com/learn/latex/Articles/How_to_change_paragraph_spacing_in_LaTeX}{here}
+
+To make use of \TeX's automatic wrapping of short alignment environments, use the \texttt{aligned}
+(or, if no alignment is needed, use the normal \verb|\[ <math> \]|) instead of the \texttt{align} environment for short equations.
+
+\newpage
+Below a demonstration on the effects of the different settings:
+
+\shade{Aquamarine}{No vertical spacing}\noverticalspacing
+
+This is text:
+\[
+    \int_{0}^{10} 4x^2 + 3x \cdot \frac{3 \ln(10)}{x^3} \dx x
+\]
+This is very long introductory text that exceeds the limit (same applies to long equations)
+\[
+    \int_{0}^{10} 4x^2 + 3x \cdot \frac{3 \ln(10)}{x^3} \dx x
+\]
+Text following the equation (no paragraph break!)
+
+
+\shade{Aquamarine}{Small vertical spacing}\smallverticalspacing
+
+This is text:
+\[
+    \int_{0}^{10} 4x^2 + 3x \cdot \frac{3 \ln(10)}{x^3} \dx x
+\]
+This is very long introductory text that exceeds the limit (same applies to long equations)
+\[
+    \int_{0}^{10} 4x^2 + 3x \cdot \frac{3 \ln(10)}{x^3} \dx x
+\]
+Text following the equation (no paragraph break!)
+
+
+\shade{Aquamarine}{Medium vertical spacing}\mediumverticalspacing
+
+This is text:
+\[
+    \int_{0}^{10} 4x^2 + 3x \cdot \frac{3 \ln(10)}{x^3} \dx x
+\]
+This is very long introductory text that exceeds the limit (same applies to long equations)
+\[
+    \int_{0}^{10} 4x^2 + 3x \cdot \frac{3 \ln(10)}{x^3} \dx x
+\]
+Text following the equation (no paragraph break!)
+
+
+\shade{Aquamarine}{Large vertical spacing}\largeverticalspacing
+
+This is text:
+\[
+    \int_{0}^{10} 4x^2 + 3x \cdot \frac{3 \ln(10)}{x^3} \dx x
+\]
+This is very long introductory text that exceeds the limit (same applies to long equations)
+\[
+    \int_{0}^{10} 4x^2 + 3x \cdot \frac{3 \ln(10)}{x^3} \dx x
+\]
+Text following the equation (no paragraph break!)