Highlight "highlight clear"
Merge branch 'highlight-highlight-clear'

Highlight "highlight clear".
Add one more test to misc/split_ext
Extract utils/path:find_ext_dot

Gets extension for file path.
Fix extension extraction for column view

It wasn't consistent with filename modifier.

Thanks to ranousse.

Fixes #54.
Do not zero *whole* buffer in format_size

No need to initialize all 24 characters.
Merge branch 'fix-ext-view-column'

Fix extension extraction for column view (wasn't consistent with
filename modifiers).

Thanks to ranousse.