First underscore in the name of class/test is interpreted as mnemonic instead of literal underscore

[alshain]

For classes containing underscores in the name, the two run entries provided by Flow need to "escape" the underscores. Currently, they are interpreted by IntelliJ as shortcut mnemonics.

Of course, I don't want random mnemonics to appear in the run menu just because my class/unit test name contains underscores.