improve usage description

main.v

@@ -209,10 +209,11 @@ fn main() {
 	fp.application('go2v')
 	fp.version('0.0.1')
 	fp.description('go2v is an utility to automatically transpile Go source code into V source code')
-	fp.arguments_description('GO_FILE/TEST_FOLDER_WITH_GO_AND_VV_PAIRS')
+	fp.usage_example('file.go')
+	fp.usage_example('tests/import_strings')
 	fp.footer('\nNormal mode:')
 	fp.footer('   Supply the path to a single .go file, that you want translated to V.')
-	fp.footer('\nTest mode:')
+	fp.footer('\nTest folder mode:')
 	fp.footer('   The test folder is expected to have 2 files in it - a .go file and a .vv file.')
 	fp.footer('   The .go file will be translated, and then the output will be compared to the .vv file.')
 	fp.footer('   A failure will be reported, if there are differences.')