Add vendor files for go build

vendor/github.com/alecthomas/chroma/lexers/e/ebnf.go

@@ -0,0 +1,51 @@
+package e
+
+import (
+	. "github.com/alecthomas/chroma" // nolint
+	"github.com/alecthomas/chroma/lexers/internal"
+)
+
+// Ebnf lexer.
+var Ebnf = internal.Register(MustNewLexer(
+	&Config{
+		Name:      "EBNF",
+		Aliases:   []string{"ebnf"},
+		Filenames: []string{"*.ebnf"},
+		MimeTypes: []string{"text/x-ebnf"},
+	},
+	Rules{
+		"root": {
+			Include("whitespace"),
+			Include("comment_start"),
+			Include("identifier"),
+			{`=`, Operator, Push("production")},
+		},
+		"production": {
+			Include("whitespace"),
+			Include("comment_start"),
+			Include("identifier"),
+			{`"[^"]*"`, LiteralStringDouble, nil},
+			{`'[^']*'`, LiteralStringSingle, nil},
+			{`(\?[^?]*\?)`, NameEntity, nil},
+			{`[\[\]{}(),|]`, Punctuation, nil},
+			{`-`, Operator, nil},
+			{`;`, Punctuation, Pop(1)},
+			{`\.`, Punctuation, Pop(1)},
+		},
+		"whitespace": {
+			{`\s+`, Text, nil},
+		},
+		"comment_start": {
+			{`\(\*`, CommentMultiline, Push("comment")},
+		},
+		"comment": {
+			{`[^*)]`, CommentMultiline, nil},
+			Include("comment_start"),
+			{`\*\)`, CommentMultiline, Pop(1)},
+			{`[*)]`, CommentMultiline, nil},
+		},
+		"identifier": {
+			{`([a-zA-Z][\w \-]*)`, Keyword, nil},
+		},
+	},
+))