\newcommand{\commitmerge}{{\mathcal M}}
\newcommand{\commitmergeof}[4]{\commitmerge(#1,#2,#3,#4)}
%\newcommand{\merge}[4]{{#2 {{\frac{ #1 }{ #3 } #4}}}}
+\newcommand{\commitmergename}{${\mathcal M}$}
\newcommand{\patch}{{\mathcal P}}
\newcommand{\base}{{\mathcal B}}