Closes #3680

And a number of other issues

Which is kind of arbitrary but seems to give less surprising
results.

Issue #3658

Closes #3667

The code is now clearer, and will prefer the nearer end of the atomic
range as long as that means there is still progress (i.e. the cursor
does not get stuck).

Issue #3658

Issue #3624

Closes #3665

So that autoclosing works.

Issue #3660

Issue #3660

This reverts commit 94fc3b71.

Closes #3651

The old behavior sees the closing %} as a haml tag begin. The result
is that the rest of the file after the %} doesnt highlight correctly.

Dont go into quote mode when stream is '{%'.

Clean up weirdly specified regexps

Closes #3641

Closes #3652

According to http://usejsdoc.org/about-getting-started.html, jsdoc comments must start with /**

Closes #3650

`@ng1.Injectable` is a legal annotation

`import "package:foo/foo.dart" as bar;` should highlight "as" as a keyword.

Closes ##3648

Make this the default

Issue #3636

Moving the mouse will change the selected hint option

So that the annotations still make sense when scrollPastEnd is enabled

Closes #3630

Closes #3623

In a raw string, a character following a "\" is not escaped.

Issue #3625

it seems `.cm-error` lost some specificity in [this commit](https://github.com/codemirror/CodeMirror/commit/a7d443ec82c1806d24e25ad8014a4d8651409320#diff-33646e9ee4d04eedb98a991a636c2302L35) that causes the error state to have same color as the tag.

Issue #3517