common: fix typo in documentation comment
#endif
/* This controls how ties are rounded. For example, does 10.5 round to
- * 10 or 11? IEEE 754 specifies round-towards-even, but bun ARMv7 (for
+ * 10 or 11? IEEE 754 specifies round-towards-even, but on ARMv7 (for
* example) doesn't support it and it must be emulated (which is rather
* slow). If you're okay with just using the default for whatever arch
* you're on, you should definitely define this. */
