DOC: Fix typos in Instructions/Guidelines.md file.
DOC: Fix typos in Instructions/Guidelines.md file.

Fix bracket style of a program's main function signature example: change
"char *argv{}" to "char *argv[]".

lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples,lorensen/VTKExamples