For Sublime's Monokai theme with Ruby, how do you
1) color method calls
(ie how do you make "generate_key" a different color.
2) make the color different inside of interpolated strings.
ie how do you make the 'puts "this is inside. Halp!" a different color?
For your second question, include this in your color theme (more info here):
<dict>
<key>name</key>
<string>Embedded Ruby Source</string>
<key>scope</key>
<string>string source.ruby.embedded.source</string>
<key>settings</key>
<dict>
<key>foreground</key>
<string>#D01F1E</string>
</dict>
</dict>
Resuling in:
For the first question, you may try this excelent tool to find out the keyword for method calls.