"Aamir's letter is short."
Translation:आमिर की चिट्ठी छोटी है।
It's apparently not doing it in this text book but usually when I write an answer my Hindi IDE stacks the curly bits of ट and ठ above each other. Is it just a different font or is one preferred over the other?
That's how the consonant conjuncts between ट, ठ, ड and ढ are written.
ट्+ठ=ट्ठ (with the letters stacked vertically if that's not how you see it on your screen)
If it's not displayed that way on your screen, there is some problem with your font.
Yeah so I'm not sure what the problem is. In the answer box for the question they stack vertically, in this box I get them side by side with a 'tick' underneath the first one. If I copy paste from one box to the other than each gets converted to the other one. :P
Your screen is just having problems displaying special conjuncts. I'm guessing you'll also have issues with क्र (क् +र), र्क (र्+क), ड्र (ड्+र), क्ष (क्+ष) and others.
The tick under the letter (called हलन्त ) represents a 'half-letter' that has only the consonant sound without the अ-vowel sound that is it usually comes with (so क=क्+अ). You can write all conjuncts using a हलन्त (for instance न्त in this word can be written as न् त) but this is seldom done outside of learning exercises.