Bug in visual multiline editing

I tried to prepend `help.` to all of these strings, but only the first one was correct, the rest got `.help`. `helpab` gets transformed to `abhelp`. `hel.` gets transformed to `.hel`. Seems to have something to do with part of the added text being present in the first element there. If I move the first line further down the issue goes away. ```c getLocStr("help.help"), getLocStr(".helpscreenshot"), getLocStr(".helpscreenshot-at-frame"), getLocStr(".helpscreenshot-surfaces"), getLocStr(".helpscreenshot-surfaces-at-frame"), getLocStr(".helpheadless"), getLocStr(".helpprint-rooms"), getLocStr(".helpprint-objects"), getLocStr(".helpprint-declared-functions"), getLocStr(".helpprint-unknown-functions"), getLocStr(".helptrace-variable-reads"), getLocStr(".helptrace-variable-writes"), getLocStr(".helptrace-function-calls"), getLocStr(".helptrace-alarms"), getLocStr(".helptrace-instance-lifecycles"), getLocStr(".helptrace-events"), getLocStr(".helptrace-collisions"), getLocStr(".helptrace-event-inherited"), getLocStr(".helptrace-tiles"), getLocStr(".helptrace-opcodes"), getLocStr(".helptrace-stack"), getLocStr(".helptrace-frames"), getLocStr(".helpalways-log-unknown-functions"), getLocStr(".helpalways-log-stubbed-functions"), getLocStr(".helpexit-at-frame"), getLocStr(".helptrace-bytecode-after-frame"), getLocStr(".helpdump-frame"), getLocStr(".helpdump-frame-json"), getLocStr(".helpdump-frame-json-file"), getLocStr(".helpspeed"), getLocStr(".helpfast-forward-speed"), getLocStr(".helpseed"), getLocStr(".helpdebug"), getLocStr(".helpdisassemble"), getLocStr(".helprecord-inputs"), getLocStr(".helpplayback-inputs"), getLocStr(".helprenderer"), getLocStr(".helplazy-rooms"), getLocStr(".helpeager-room"), getLocStr(".helpos-type"), getLocStr(".helpwindow-size"), getLocStr(".helpprofile-gml-scripts"), getLocStr(".helpsave-folder"), getLocStr(".helpgame-args"), ```