Fix small offset in Signed and Date lines in the Declaration of Authorship

ecsdocs.dtx

@@ -1239,11 +1239,10 @@ I confirm that:
 \end{enumerate}
 
 \vspace{15.0mm}
-\begin{minipage}{0.7\textwidth}
+\begin{minipage}[t]{0.7\textwidth}
   Signed:..........................................................................
 \end{minipage}%
-\begin{minipage}{0.3\textwidth}
-\vspace{3.0mm}
+\begin{minipage}[t]{0.3\textwidth}
   Date:..................
 \end{minipage}
 \vfil\vfil\null