- multiple fixes in the Tcl commands (especially regarding the interchange between True/false and 1/0 values)

- updated the help for all Tcl Commands
- in Tcl Shell, the 'help' command will add also a brief description for each command in the list

tclCommands/TclCommandAddRectangle.py

@@ -10,6 +10,8 @@ class TclCommandAddRectangle(TclCommandSignaled):
     # array of all command aliases, to be able use  old names for backward compatibility (add_poly, add_polygon)
     aliases = ['add_rectangle']
 
+    description = '%s %s' % ("--", "Creates a rectangle in the given Geometry object.")
+
     # Dictionary of types from Tcl command, needs to be ordered.
     # For positional arguments
     arg_names = collections.OrderedDict([
@@ -31,7 +33,7 @@ class TclCommandAddRectangle(TclCommandSignaled):
 
     # structured help for current command, args needs to be ordered
     help = {
-        'main': "Add a rectange to the given Geometry object.",
+        'main': "Creates a rectangle in the given Geometry object.",
         'args': collections.OrderedDict([
             ('name', 'Name of the Geometry object in which to add the rectangle.'),
             ('x0 y0', 'Bottom left corner coordinates.'),