feat: Support space-delimited tags in FrontMatter transformer (#620)

quartz/plugins/transformers/frontmatter.ts

@@ -8,11 +8,13 @@ import { slugTag } from "../../util/path"
 export interface Options {
   delims: string | string[]
   language: "yaml" | "toml"
+  oneLineTagDelim: string
 }
 
 const defaultOptions: Options = {
   delims: "---",
   language: "yaml",
+  oneLineTagDelim: ",",
 }
 
 export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined> = (userOpts) => {
@@ -20,6 +22,8 @@ export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined>
   return {
     name: "FrontMatter",
     markdownPlugins() {
+      const { oneLineTagDelim } = opts
+
       return [
         [remarkFrontmatter, ["yaml", "toml"]],
         () => {
@@ -45,7 +49,7 @@ export const FrontMatter: QuartzTransformerPlugin<Partial<Options> | undefined>
             if (data.tags && !Array.isArray(data.tags)) {
               data.tags = data.tags
                 .toString()
-                .split(",")
+                .split(oneLineTagDelim)
                 .map((tag: string) => tag.trim())
             }