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/documentation.gold

@@ -22,4 +22,4 @@ var documentationMatchers = substring.Or(
 	substring.Regexp(`(^|/)README(\.|$)`),
 	substring.Regexp(`(^|/)[Rr]eadme(\.|$)`),
 	substring.Regexp(`^[Ss]amples?/`),
-	)
+)