[Feature request] Switching to uppercase / lowercase

[printly]

Is it possible to change a case of а character?
for example, it's possible to do it as described here, but I can't achieve this in your plugin.

e.g. if I want to modify
test sentence -> Test sentence
in sublime text editor I can do it this way:

Find what:
\b(\w)()
Replace with:
\U$1

But this trick doesn't seem to be worked in your plugin...

it renames
test sentence
to
\Utest sentence
instead of making first letter uppercase

Thank you in advance!