Fix 'numer of', since 'NUMER' by itself is valid abbrev for numerator.

Oddly, misspell was not able to detect this one, even though in
theory it allows detecting multiword typos, so the fix was done by
hand.

misspell.csv

@@ -22,6 +22,7 @@ implmented,implemented
 interrut,interrupt
 interupt,interrupt
 measuing,measuring
+numer of,number of
 orignal,original
 overrided,overridden
 poiners,pointers

src/runtime/runtime_nrf.go

@@ -103,7 +103,7 @@ func nanosecondsToTicks(ns int64) timeUnit {
 	return timeUnit(ns * 64 / 1953125)
 }
 
-// Monotonically increasing numer of ticks since start.
+// Monotonically increasing number of ticks since start.
 func ticks() timeUnit {
 	// For some ways of capturing the time atomically, see this thread:
 	// https://www.eevblog.com/forum/microcontrollers/correct-timing-by-timer-overflow-count/msg749617/#msg749617

src/runtime/runtime_nrf52840.go

@@ -106,7 +106,7 @@ func nanosecondsToTicks(ns int64) timeUnit {
 	return timeUnit(ns * 64 / 1953125)
 }
 
-// Monotonically increasing numer of ticks since start.
+// Monotonically increasing number of ticks since start.
 func ticks() timeUnit {
 	// For some ways of capturing the time atomically, see this thread:
 	// https://www.eevblog.com/forum/microcontrollers/correct-timing-by-timer-overflow-count/msg749617/#msg749617