Sometimes Only Part of Text is Highlighted

[ndrewh]

Definitely related to #10

Sometimes, only part of the text is highlighted. Something like this is often logged when this happens:

Removed Indexes:<NSMutableIndexSet: 0x14eca9b0>[number of indexes: 106 (in 1 ranges), indexes: (0-105)]

In case it means anything, it was being highlighted up to about character 105 (see log). Sometimes none of the text is highlighted and something like this is logged:

Removed Indexes:<NSMutableIndexSet: 0x14dacef0>[number of indexes: 306 (in 2 ranges), indexes: (8086-8299 8302-8393)]

When it works perfectly, nothing was logged or Removed Indexes:<NSMutableIndexSet: 0x176d2b10>(no indexes) was logged