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"
)

As spotted by the extended linter.

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>.

by Soumen Basak

Courtesy of Soumen Basak

Courtesy of Łukasz Frankowski

Instead of hard-coding all kinds of language-specific behaviours in the
mode itself, specializations can now pass character hooks to implement
their own highlighting.

This normalizes the classes used by most of the modes
(reStructuredText and diff didn't fit in), and makes them all
reference a central style sheet (under theme/). It also adds a theme
option that can be set to change the theme, and defines a few
different themes (some based on old mode colors).

(now that column() does proper tab-counting, it should no
longer be used to check for start-of-line, since that's a
huge waste of time)