When rendering large operators (e.g., sum, integral) with scripts in text
mode, the operator glyph was incorrectly positioned after its subscripts
and superscripts instead of before them. This caused expressions like
\sum_{i=1}^{n} i = \frac{n(n+1)}{2} to render with the equals sign
appearing visually misplaced.
Root cause:
The line-breaking refactoring introduced double-positioning of large
operators. makeLargeOp() internally sets the operator position, advances
currentPosition.x, and adds script displays. However, the calling code
then overwrote the position and advanced currentPosition.x again, causing:
- Double-advancement leading to incorrect width calculations
- Scripts positioned before the operator instead of after
Solution:
Save and restore typesetter state before/after line break dimension checks,
then call makeLargeOp() once at the correct position after handling line
breaks and inter-element spacing.
