reading and writing of entries with the grammar, mostly spaces and newlines changed

entries/tux_of_math_command.md

@@ -3,8 +3,8 @@
 _Math drill game starring Tux, the Linux Penguin._
 
 - Home: https://web.archive.org/web/20180423060214/http://tux4kids.alioth.debian.org/, https://sourceforge.net/projects/tuxmath/
-- Media: https://en.wikipedia.org/wiki/Tux,_of_Math_Command
-- State: mature, inactive since 2011 
+- Media: "https://en.wikipedia.org/wiki/Tux,_of_Math_Command"
+- State: mature, inactive since 2011
 - Download: https://sourceforge.net/projects/tuxmath/files/
 - Platform: Linux
 - Keywords: educational, for kids, tux
@@ -17,4 +17,3 @@ Lost SVN (was at svn.debian.org/wsvn/tux4kids/tuxmath).
 ## Building
 
 - Build system: CMake
-