$[VAR] string substitution does NOT work inside a command substitution

[calfzhou]

In drake's document, it saids that $[VAR] string substitution does work inside a command, but i found that it does NOT work (with drake 0.1.5).

In the document (section Command substitution), there is an example:

TEXT="a b c"
VAR=$(echo "$[TEXT]" | wc -w)         ; "3"

I tried it but the value of VAR is 1.

[calfzhou]

This bug seems only occurs in v0.1.5. It works in v0.1.4 and early versions.

[calfzhou]

The bug is caused by commit 7eaf49e