more about making acronym optional

base/proposal.dtx

@@ -935,7 +935,7 @@
 {\begin{center}
   {\LARGE Final Project Report}\\[.2cm]
   {\LARGE\textbf{\prop@gen@title}}\\[.3cm]
-  {\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]
+  \ifx\prop@gen@acronym\@empty\else{\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]\fi
   {\large\today}\\[1em]
   \begin{tabular}{c*{\the@PIs}{c}}
     \prop@tl\prop@gen@PIs{\wa@ref3{person}\tl@ext{name}}\\

base/reporting.cls

@@ -51,7 +51,7 @@
 {\begin{center}
   {\LARGE Final Project Report}\\[.2cm]
   {\LARGE\textbf{\prop@gen@title}}\\[.3cm]
-  {\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]
+  \ifx\prop@gen@acronym\@empty\else{\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]\fi
   {\large\today}\\[1em]
   \begin{tabular}{c*{\the@PIs}{c}}
     \prop@tl\prop@gen@PIs{\wa@ref3{person}\tl@ext{name}}\\

dfg/dfgproposal.cls

@@ -42,7 +42,7 @@
 \begin{center}
 {\LARGE \prop@gen@instrument}\\[.2cm]
 {\LARGE\textbf{\prop@gen@title}}\\[.3cm]
-{\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]
+\ifx\prop@gen@acronym\@empty\else{\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]\fi
 {\large\today}\\[1em]
 \WAauthorblock[aff]\prop@gen@PIs\\[2cm]
 \end{center}

dfg/dfgproposal.dtx

@@ -336,7 +336,7 @@ Applicant\if@sites\ifnum\the@PIs>1{s}\fi\fi\ \deu{(Antragsteller)}}%
 \begin{center}
 {\LARGE \prop@gen@instrument}\\[.2cm]
 {\LARGE\textbf{\prop@gen@title}}\\[.3cm]
-{\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]
+\ifx\prop@gen@acronym\@empty\else{\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]\fi
 {\large\today}\\[1em]
 \WAauthorblock[aff]\prop@gen@PIs\\[2cm]
 \end{center}
@@ -441,7 +441,7 @@ Applicant\if@sites\ifnum\the@PIs>1{s}\fi\fi\ \deu{(Antragsteller)}}%
 \begin{center}
   {\LARGE Final Project Report}\\[.2cm]
   {\LARGE\textbf{\prop@gen@title}}\\[.3cm]
-  {\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]
+\ifx\prop@gen@acronym\@empty\else{\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]\fi
   {\large Reference number(s): \show@prop@gen@keys}\\[.2cm]
   {\large\today}\\[1em]
  \begin{tabular}{c*{\the@PIs}{c}}

dfg/dfgreporting.cls

@@ -41,7 +41,7 @@
 \begin{center}
   {\LARGE Final Project Report}\\[.2cm]
   {\LARGE\textbf{\prop@gen@title}}\\[.3cm]
-  {\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]
+\ifx\prop@gen@acronym\@empty\else{\LARGE Acronym: {\prop@gen@acronym}}\\[.2cm]\fi
   {\large Reference number(s): \show@prop@gen@keys}\\[.2cm]
   {\large\today}\\[1em]
  \begin{tabular}{c*{\the@PIs}{c}}

eu/euproposal.cls

@@ -45,7 +45,7 @@
   {\Large\textbf\prop@gen@callname}\\[.4cm]
   {\LARGE \prop@gen@callid}\\[.8cm]
   {\huge\textbf\prop@gen@title}\\[.4cm]
-  {\LARGE Acronym: {\prop@gen@acronym}}\\[2cm]
+  \ifx\prop@gen@acronym\@empty\else{\LARGE Acronym: {\prop@gen@acronym}}\\[2cm]\fi
 \end{center}
 {\large\textbf{Date of Preparation: \today}}
 \\[1em]

eu/euproposal.dtx

@@ -331,7 +331,7 @@
   {\Large\textbf\prop@gen@callname}\\[.4cm]
   {\LARGE \prop@gen@callid}\\[.8cm]
   {\huge\textbf\prop@gen@title}\\[.4cm]
-  {\LARGE Acronym: {\prop@gen@acronym}}\\[2cm]
+  \ifx\prop@gen@acronym\@empty\else{\LARGE Acronym: {\prop@gen@acronym}}\\[2cm]\fi
 \end{center}
 %{\large\prop@gen@instrument}\\
 {\large\textbf{Date of Preparation: \today}}