Ruby Syntax Replacer
apm install ruby-syntax-replacer
When run (by pressing cmd+alt+x), will replace all old Ruby hash syntax in the current file with new, that is:
:name => 'Mads Ohm Larsen',
:age => '25',
:position => 'Lead developer'
name: 'Mads Ohm Larsen',
position: 'Lead developer'
It also does selection-wise replacements.