Fastfix for previous two commits (sorry) and chroma update.

Well, doing "git add ." not from repository's root is a bad idea.

Updated chroma dependency, added more languages to syntax highlighting.

vendor/github.com/alecthomas/chroma/lexers/r/rst.go

@@ -61,7 +61,7 @@ var Restructuredtext = internal.Register(MustNewLexer(
 
 func rstCodeBlock(groups []string, lexer Lexer) Iterator {
 	iterators := []Iterator{}
-	tokens := []*Token{
+	tokens := []Token{
 		{Punctuation, groups[1]},
 		{Text, groups[2]},
 		{OperatorWord, groups[3]},
@@ -73,7 +73,7 @@ func rstCodeBlock(groups []string, lexer Lexer) Iterator {
 	code := strings.Join(groups[8:], "")
 	lexer = internal.Get(groups[6])
 	if lexer == nil {
-		tokens = append(tokens, &Token{String, code})
+		tokens = append(tokens, Token{String, code})
 		iterators = append(iterators, Literator(tokens...))
 	} else {
 		sub, err := lexer.Tokenise(nil, code)

vendor/github.com/alecthomas/chroma/lexers/r/rust.go

@@ -12,6 +12,7 @@ var Rust = internal.Register(MustNewLexer(
 		Aliases:   []string{"rust"},
 		Filenames: []string{"*.rs", "*.rs.in"},
 		MimeTypes: []string{"text/rust"},
+		EnsureNL:  true,
 	},
 	Rules{
 		"root": {