String primitive nextIndexOfFromTo incorrect result for intra-character
String primitive nextIndexOfFromTo incorrect result for intra-character

Initiating a search for a character in a UTF encoded string starting from
a code unit other than the leading code unit fails to find the next
occurrence of a character correctly.

objectarts/Dolphin,jgfoster/Dolphin,shoshanatech/Dolphin,dolphinsmalltalk/Dolphin,dolphinsmalltalk/Dolphin,shoshanatech/Dolphin,dolphinsmalltalk/Dolphin,shoshanatech/Dolphin,jgfoster/Dolphin,objectarts/Dolphin,jgfoster/Dolphin,shoshanatech/Dolphin,dolphinsmalltalk/Dolphin,jgfoster/Dolphin