feat: inline comment tag (#514)

* style: remove unnecessary intermediate constant

* feat: add inline comment tag

* refactor: use readIdentifier when reading tag names

* docs: add inline comment tag

src/parser/tokenizer.ts

@@ -207,8 +207,7 @@ export class Tokenizer {
     const begin = this.p
     let end = this.N
     if (this.readToDelimiter('\n') !== -1) end = this.p
-    const token = new LiquidTagToken(input, begin, end, options, file)
-    return token
+    return new LiquidTagToken(input, begin, end, options, file)
   }
 
   mkError (msg: string, begin: number) {
@@ -234,6 +233,13 @@ export class Tokenizer {
     return new IdentifierToken(this.input, begin, this.p, this.file)
   }
 
+  readTagName (): string {
+    this.skipBlank()
+    // Handle inline comment tags
+    if (this.input[this.p] === '#') return this.input.slice(this.p, ++this.p)
+    return this.readIdentifier().getText()
+  }
+
   readHashes (jekyllStyle?: boolean) {
     const hashes = []
     while (true) {