update vim shortcut command to work when shortcuts file has no line n… #48
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I often use grep/ack/ag with the "-l" switch to just list relevant files without listing exact line number matches. sack/sag displays good output with this switch, but the generated ~/.sack_shortcuts file causes problems in the create_shortcut_vim_cmd function. This change updates that function to check to see if line numbers are present in ~/.sack_shortcuts. If they are, it functions as before. If not, it launches Vim without a line number.
I didn't test this functionality with other editors, this just affects Vim users.