How to concatenate strings in TCL without adding whitespace

Question

I want to concatenate two strings without any whitespaces between the strings that are being concatenated. But when I use the commands below, I get strings concatenated with whitespaces added between them. How to concatenate the strings without adding whitespaces?

set A "Test"
set B "data"

set C $A$B

Current Output :

Test       data

I need output similar to this :

Testdata

Answer 1

If I try that, it works like this:

$ tclsh
% set A "Test"
Test
% set B "data"
data
% set C $A$B
Testdata

Could it be you have accidentally entered some control character between A and $?