Autocomplete for class names causes second period

[jbrew138]

Issue:

When using the autocomplete and typing out an existing class name with a period in front of it the auto complete adds a second period after.

Expected behavior:

Autocomplete consumes or ignores the original period typed.

Example:

With an existing class .item-list, typing out the partial class .item- and pressing Tab or Enter causes the autocomplete to return ..item-list

Versions:

ide-css 0.3.2
Atom 1.35.1
atom-ide-ui 0.13.0

[mavalentin]

this issue also exists with colon-preceded identifiers, such as :nth-of-type and all others.