Hello, I have problem whit scripting in ver. 3.4

Problem is whit string concatenation. In ver. 2.9 all working OK.
Too in ver. 3.2 is this problem OK. I not test this in ver. 3.3.

Simple example 1:

ver. 3.4
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[admin@dsi] > :global mymtname dsi
[admin@dsi] > :put $mymtname
dsi
[admin@dsi] > :global bacfilename ($mymtname . ".backup")
[admin@dsi] > :put $bacfilename
dsi;.backup
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dsi;.backup is not OK

OK is dsi.backup

Why ";" (inland)?

Not working either example from http://www.mikrotik.com/testdocs/ros/2. ... ontent.php

Concatenation
[admin@MikroTik] interface> :put (1,2 . 3)
1,2,3

ver. 3.4
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[admin@dsi] > :put (1,2 . 3)
syntax error (line 1 column
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Where is problem?

First is known problem and will be fixed in 3.5
Second won't work because strings must be quoted:
:put ("1,2," . "3");