Document that <% # doesn't work

k0kubun · k0kubun · commit b58b188028fb · 2021-05-05T23:10:14.000-07:00
[Bug #17846]
diff --git a/README.md b/README.md
@@ -32,7 +32,7 @@ on the rules below:
 ```erb
 <% Ruby code -- inline with output %>
 <%= Ruby expression -- replace with result %>
-<%# comment -- ignored -- useful in testing %>
+<%# comment -- ignored -- useful in testing %> (`<% #` doesn't work. Don't use Ruby comments.)
 % a line of Ruby code -- treated as <% line %> (optional -- see ERB.new)
 %% replaced with % if first thing on a line and % processing is used
 <%% or %%> -- replace with <% or %> respectively
diff --git a/lib/erb.rb b/lib/erb.rb
@@ -46,7 +46,7 @@
 #
 #   <% Ruby code -- inline with output %>
 #   <%= Ruby expression -- replace with result %>
-#   <%# comment -- ignored -- useful in testing %>
+#   <%# comment -- ignored -- useful in testing %> (`<% #` doesn't work. Don't use Ruby comments.)
 #   % a line of Ruby code -- treated as <% line %> (optional -- see ERB.new)
 #   %% replaced with % if first thing on a line and % processing is used
 #   <%% or %%> -- replace with <% or %> respectively

Original file line number	Diff line number	Diff line change
`@@ -46,7 +46,7 @@`
`46`	`46`	`#`
`47`	`47`	`# <% Ruby code -- inline with output %>`
`48`	`48`	`# <%= Ruby expression -- replace with result %>`
`49`		`-# <%# comment -- ignored -- useful in testing %>`
	`49`	+# <%# comment -- ignored -- useful in testing %> (`<% #` doesn't work. Don't use Ruby comments.)
`50`	`50`	`# % a line of Ruby code -- treated as <% line %> (optional -- see ERB.new)`
`51`	`51`	`# %% replaced with % if first thing on a line and % processing is used`
`52`	`52`	`# <%% or %%> -- replace with <% or %> respectively`