Fix typo reported by Joonas Paalasmaa: dada-->data

Doc/dist/dist.tex

@@ -1239,7 +1239,7 @@ extending the Distutils.)
 Executable Windows installers are the natural format for binary
 distributions on Windows.  They display a nice graphical user interface,
 display some information of the module distribution to be installed, taken
-from the meta-dada in the setup script, let the user select a few
+from the meta-data in the setup script, let the user select a few
 (currently maybe too few) options, and start or cancel the installation.
 
 Since the meta-data is taken from the setup script, creating