changed generator_test.go to use only TestFromFile

modified *.test.yml to contain only necessary information

fixed white spaces

remove duplicated file languages.test.tmpl

internal/code-generator/generator/test_files/vendor.gold

@@ -21,4 +21,4 @@ var vendorMatchers = substring.Or(
 	substring.Regexp(`(^|/)ltsugar.m4`),
 	substring.Regexp(`(^|/)ltversion.m4`),
 	substring.Regexp(`(^|/)lt~obsolete.m4`),
-	)
+)