It doesn't seem to be possible to capture it an perform an actual
undo, unfortunately.

Issue #3142

Closes #3140

Closes #3141

See http://discuss.codemirror.net/t/click-on-bookmark-should-set-the-cursor/175

Issue #3138

Better auto-indent and highlighting.

Issue #3132

Issue #2573

Issue #3125

Issue #3127

Closes #3130

Closes #3128

Issue #3117

Make JavaScript mode autoclose backticks, remove single quote closing
for Lisp modes, and add explicit triple-quote rule to languages supporting
triple quoting.

Issue #3110

Also set CodeMirror-linenumber to nowrap.

Works around issue where a rounding error causes the line
numbers to wrap in some situations on iOS.

Closes #3068

Issue #3117

Thus allowing a user to specify a non-global regexp, causing a hang
in buildToken

Issue #3117

Closes #3113

Closes #3114

Looking up arbitrary strings without a hasOwnProperty check
never ends well.

Closes #3106

Issue #3104