Tests for regexp with multi-byte encoding and various magic settings.
Test matchstr() with a count and multi-byte chars.

STARTTEST
:so mbyte.vim
:set nocompatible encoding=utf-8 termencoding=latin1 viminfo+=nviminfo
/^1
/a*b\{2}c\+/e
x/\Md\*e\{2}f\+/e
x:set nomagic
/g\*h\{2}i\+/e
x/\mj*k\{2}l\+/e
x/\vm*n{2}o+/e
x/\V^aa$
x:set magic
/\v(a)(b)\2\1\1/e
x/\V[ab]\(\[xy]\)\1
x:" Now search for multi-byte without composing char
/ม
x:" Now search for multi-byte with composing char
/ม่
x:" find word by change of word class
/ち\<カヨ\>は
x:?^1?,$w! test.out
:e! test.out
G:put =matchstr(\"אבגד\", \".\", 0, 2) " ב
:put =matchstr(\"אבגד\", \"..\", 0, 2) " בג
:put =matchstr(\"אבגד\", \".\", 0, 0) " א
:put =matchstr(\"אבגד\", \".\", 4, -1) " ג
:w!
:qa!
ENDTEST

1 a aa abb abbccc
2 d dd dee deefff
3 g gg ghh ghhiii
4 j jj jkk jkklll
5 m mm mnn mnnooo
6 x ^aa$ x
7 (a)(b) abbaa
8 axx [ab]xx
9 หม่x อมx
a อมx หม่x
b ちカヨは