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.

tikz/topology-continuous-mapping/topology-continuous-mapping.tex

@@ -17,7 +17,7 @@
     },
 }
 \begin{tikzpicture}
-  
+
     \draw[->] (-0.5,0) -- (1.5,0) node [below] {$\mathbb{R}$};
 
     \foreach \x in {0,...,1}