Don't run the code twice when context.runFile is used.
Don't run the code twice when context.runFile is used.

This was a mistake in the earlier refactoring to generalize the interface
to support arbitrary combinations of files and literal strings.

fusikky/node-angularcontext,apparentlymart/node-angularcontext,rit/node-angularcontext,thrashr888/node-angularcontext