Closes #4739

Reference: https://golang.org/pkg/builtin/#rune

It is, per https://golang.org/ref/spec#Predeclared_identifiers

Don't treat backslashes specially inside of them

Closes #3428

Closes #3093

Bumping them for every release just adds too much git
noise and history blowup.

As a result, the common pattern

import (
	"foo"
	"bar"
	)

will re-indent automatically to the gofmt-blessed

import (
	"foo"
	"bar"
)

Closes #1133

As spotted by the extended linter.

Add CodeMirror.defineOption function for defining new options.

Add findMatchingBracket to the methods exported by this extension.

Closes #746

It is not part of the set of styled classes.

Signed-off-by: Thaddee Tyl <thaddee.tyl@gmail.com>

Signed-off-by: Thaddee Tyl <thaddee.tyl@gmail.com>

It uses colors similar to those seen on <http://golang.org>.