EM_SETCHARFORMAT with wParam==0 sets default char format and does NOT set modify step flag.
EM_SETCHARFORMAT with wParam==SCF_SELECTION only sets modify step flag when selection is nonempty.
EM_GETMODIFY returns -1, not 1, when modify flag is set.
Tests for the above behavior.

richedit: Only notify selection change when selection has actually changed from previous notification.

Otherwise, redundant and early notifications are sent to apps that do not expect them. Fixes crash #1 with Perfect! TextEdit.

richedit: Implement rule that in 1.0 emulation, a single CR that terminates the text is NOT a line break.

Fix riched32 test that now succeed.

Document remaining uses of bEmulateVersion10 and other checks for CRLF in editor.c.
Make RTF reader emit a \r or a \r\n according to emulation, not a \n, which breaks streaming tests.
Remove todo_wine from a bunch of riched32 tests that now succeed.

richedit: Remove indication for bCRLF, now that ME_GetTextW() knows how to honor CR and LF counters.

EM_GETTEXTRANGE and EM_GETSELTEXT are affected by this, so include tests to ensure no behavior was broken.

ME_GetTextLengthEx should ignore GTL_USECRLF in 1.0 emulation mode.

Add fixup to ME_FindItemAtOffset(), fixes crash by null-pointer access.
Add tests for EM_LINELENGTH.

Add richedit 1.0 tests for EM_GETLINE.

Text streamout now honors CR and LF counters.
Tests to pin down required EM_STREAMOUT behavior.

As pointed out by Dmitry Timoshkov.