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

docs/source/_data/sidebar.yml

@@ -78,6 +78,7 @@ filters:
 
 tags:
   overview: overview.html
+  "# (inline comment)": inline_comment.html
   assign: assign.html
   capture: capture.html
   case: case.html

docs/source/tags/inline_comment.md

@@ -0,0 +1,50 @@
+---
+title: "# (inline comment)"
+---
+
+{% since %}v9.38.0{% endsince %}
+
+Add comments to a Liquid template using an inline tag. Text enclosed in an inline comment tag will not be printed.
+
+Input
+```liquid
+Anything inside an inline comment tag will not be printed.
+{% # this is an inline comment %}
+But every line must start with a '#'.
+{%
+  # this is a comment
+  # that spans multiple lines
+%}
+```
+
+Output
+```text
+Anything inside an inline comment tag will not be printed.
+But every line must start with a '#'.
+```
+
+Inline comments are useful inside <a href="./liquid.html">`liquid`</a> tags too.
+
+```liquid
+{% liquid
+  # required args
+  assign product = collection.products.first
+
+  # optional args
+  assign should_show_border = should_show_border | default: true
+  assign should_highlight = should_highlight | default: false
+%}
+```
+
+But they don't work well for commenting out blocks of Liquid code. The <a href="./comment.html">`comment`</a> block tag is the better option when you need to temporarily stop other tags from being executed.
+
+Input
+```liquid
+{%- # {% echo 'Welcome to LiquidJS!' %} -%}
+{% comment %}{% echo 'Welcome to LiquidJS!' %}{% endcomment %}
+```
+
+Output
+```text
+ -%}
+```