Remove trailing spaces

The commands

find . -type f -name '*.md' -exec sed --in-place 's/[[:space:]]\+$//' {} \+

and

find . -type f -name '*.tex' -exec sed --in-place 's/[[:space:]]\+$//' {} \+

were used to do so.

documents/math-minimal-distance-to-cubic-function/quadratic-case-2.2.tex

@@ -48,10 +48,10 @@ Now get back to the original equation:
 Now continue with only the numerator
 \begin{align}
     0 &\stackrel{!}{=}
-    - 12 \alpha^3 
+    - 12 \alpha^3
     + (\sqrt{3(4 \alpha^3 + 27 \beta^2)}-9\beta)^2
     + 18 (\sqrt{3(4 \alpha^3 + 27 \beta^2)} - 9 \beta) \beta\\
-    &= 
+    &=
     \color{red}- 12 \alpha^3 \color{black}+
     \left (
         3(\color{red}4 \alpha^3\color{black} + \color{blue}27 \beta^2 \color{black})