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/constant-functions.tex

@@ -1,9 +1,9 @@
 \chapter{Constant functions}
 \section{Defined on $\mdr$}
 \begin{lemma}
-Let $f:\mdr \rightarrow \mdr$, $f(x) := c$ with $c \in \mdr$ be a constant function. 
+Let $f:\mdr \rightarrow \mdr$, $f(x) := c$ with $c \in \mdr$ be a constant function.
 
-Then $(x_P, f(x_P))$ is the only point on the graph of $f$ with 
+Then $(x_P, f(x_P))$ is the only point on the graph of $f$ with
 minimal distance to $P$.
 \end{lemma}
 
@@ -42,7 +42,7 @@ The situation can be seen in Figure~\ref{fig:constant-min-distance}.
           \addlegendentry{$f(x)=1$}
           \addlegendentry{$g(x)=2$}
           \addlegendentry{$h(x)=3$}
-        \end{axis} 
+        \end{axis}
     \end{tikzpicture}
     \caption{Three constant functions and their points with minimal distance}
     \label{fig:constant-min-distance}
@@ -69,8 +69,8 @@ This result means:
 
 \section{Defined on a closed interval $[a,b] \subseteq \mdr$}
 \begin{theorem}[Solution formula for constant functions]
-Let $f:[a,b] \rightarrow \mdr$, $f(x) := c$ with $a,b,c \in \mdr$ and 
-$a \leq b$ be a constant function. 
+Let $f:[a,b] \rightarrow \mdr$, $f(x) := c$ with $a,b,c \in \mdr$ and
+$a \leq b$ be a constant function.
 
 Then the point $(x, f(x))$ of $f$ with minimal distance to $P$ is
 given by:
@@ -119,7 +119,7 @@ given by:
           \addlegendentry{$f(x)=1, D = [-5,-2]$}
           \addlegendentry{$g(x)=1.5, D = [-1,3]$}
           \addlegendentry{$h(x)=3, D = [3,5]$}
-        \end{axis} 
+        \end{axis}
     \end{tikzpicture}
     \caption{Three constant functions and their points with minimal distance}
     \label{fig:constant-min-distance-closed-intervall}