Strings untranslatable due to word puzzles

[Yuri Chornoivan]

Some relatively new strings in 0.92.x branch are actually untranslatable due
to such called "string puzzles":

http://bazaar.launchpad.net/~inkscape.dev/inkscape/0.92.x/view/head:/share/extensions/draw_from_triangle.py#L179

inkex.errormsg(_("Side Length 'a' (" + unit + "): " + str( params[0][0] ) ))
inkex.errormsg(_("Side Length 'b' (" + unit + "): " + str( params[0][1] ) ))
inkex.errormsg(_("Side Length 'c' (" + unit + "): " + str( params[0][2] ) ))

http://bazaar.launchpad.net/~inkscape.dev/inkscape/0.92.x/view/head:/share/extensions/draw_from_triangle.py#L186

inkex.errormsg(_("Area ("+ unit + "^2): " + str( params[4][0] ) ))

extracts as

Side Length 'a' (
Side Length 'b' (
Side Length 'c' (
Area (

That is not what expected.

It was proposed to fix it like this:

inkex.errormsg(_("Side Length 'a'") + " (" + unit + "): " + str( params[0][0] ) )

But it is not a good way because of some languages (French) punctuation rules. In French, there should be a space before ":" ("Longueur du côté «a» (cm) :").

[jazzynico (jazzynico)]

I'd rather see something like:
inkex.errormsg(_("Side Length 'a' ({0}): {1}".format(unit, str(params[0][0])) ))

Full patch attached.

[jazzynico (jazzynico)]

Targetting 0.93.
Don't hesitate to tell me if it should be backported to 0.92 (I don't want to annoy translators with another tiny string update).

[jazzynico (jazzynico)]

Difficult to test for now. All the Inkscape versions installed on my Xubuntu 16.04 computer don't translate the extension correctly (0.91, 0.92 and trunk). Investigations in progress.

[jazzynico (jazzynico)]

My fault. Working patch attached.

[jazzynico (jazzynico)]

Backport accepted (IRC).

[jazzynico (jazzynico)]

Fixed in lp:inkscape/0.92.x rev. 15313 and lp:inkscape rev. 15405.