fix thmstyle spacing with parskip

src/environments/thmstyle/thmstyle.dtx

@@ -80,6 +80,13 @@
 % \end{function}
 % 
 % \section{Default styles}
+% 
+% 
+% The package has the option to provide some default styles.
+% These can be loaded with the |default styles| (the space is optional)
+% option, when loading the package.
+% 
+% 
 % \subsection{colors}
 %
 % \begin{variable}{gold}
@@ -261,7 +268,11 @@
         rightline       = false,
         topline         = false,
         bottomline      = false,
-        backgroundcolor = #3
+        backgroundcolor = #3,
+        skipabove       = 0.7\baselineskip,
+        skipbelow       = 0pt,
+        innerrightmargin = 10pt,
+        innerbottommargin = 5pt
       }
       {
         #1