FindLua{50,51}: Fix preformatted documentation blocks

Avoid duplicate `::`.

Modules/FindLua50.cmake

@@ -5,28 +5,19 @@
 FindLua50
 ---------
 
-
-
 Locate Lua library.
-This module defines::
 
-::
+This module defines::
 
   LUA50_FOUND, if false, do not try to link to Lua
   LUA_LIBRARIES, both lua and lualib
   LUA_INCLUDE_DIR, where to find lua.h and lualib.h (and probably lauxlib.h)
 
-
-
-Note that the expected include convention is
-
-::
+Note that the expected include convention is::
 
   #include "lua.h"
 
-and not
-
-::
+and not::
 
   #include <lua/lua.h>
 

Modules/FindLua51.cmake

@@ -5,29 +5,20 @@
 FindLua51
 ---------
 
-
-
 Locate Lua library.
 This module defines::
 
-::
-
   LUA51_FOUND, if false, do not try to link to Lua
   LUA_LIBRARIES
   LUA_INCLUDE_DIR, where to find lua.h
   LUA_VERSION_STRING, the version of Lua found (since CMake 2.8.8)
 
 
-
-Note that the expected include convention is
-
-::
+Note that the expected include convention is::
 
   #include "lua.h"
 
-and not
-
-::
+and not::
 
   #include <lua/lua.h>