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/internal/api.go

@@ -144,13 +144,16 @@ func Register(lexer chroma.Lexer) chroma.Lexer {
 	return lexer
 }
 
-// Fallback lexer if no other is found.
-var Fallback chroma.Lexer = chroma.MustNewLexer(&chroma.Config{
-	Name:      "fallback",
-	Filenames: []string{"*"},
-}, chroma.Rules{
+// Used for the fallback lexer as well as the explicit plaintext lexer
+var PlaintextRules = chroma.Rules{
 	"root": []chroma.Rule{
 		{`.+`, chroma.Text, nil},
 		{`\n`, chroma.Text, nil},
 	},
-})
+}
+
+// Fallback lexer if no other is found.
+var Fallback chroma.Lexer = chroma.MustNewLexer(&chroma.Config{
+	Name:      "fallback",
+	Filenames: []string{"*"},
+}, PlaintextRules)