diff --git a/posts/2025-06-22-test-nginx-conf-directives.md b/posts/2025-06-22-test-nginx-conf-directives.md
index 940dab4..b7ea346 100644
--- a/posts/2025-06-22-test-nginx-conf-directives.md
+++ b/posts/2025-06-22-test-nginx-conf-directives.md
@@ -398,11 +398,14 @@ Edit Makefile:
 
     --add-host=git.domain.abc=$(loopback) \
 
+Rebuild image:
 
 ```console
 $ make image-rm image-build
 ```
 
+Run tests:
+
 ```console
 $ make test
 ●●●●
diff --git a/renderers/markdown.moon b/renderers/markdown.moon
index 93cc393..131ddad 100644
--- a/renderers/markdown.moon
+++ b/renderers/markdown.moon
@@ -48,7 +48,7 @@ escape_cosmo = (str) ->
 
   cosmo = parse_cosmo! / (tpl) ->
     counter += 1
-    key = "#{dollar_temp}.#{counter}"
+    key = "#{dollar_temp}_#{counter}"
     escapes[key] = tpl
     key
 
@@ -59,7 +59,7 @@ escape_cosmo = (str) ->
 unescape_cosmo = (str, escapes) ->
   import P, R, Cmt, Cs from require "lpeg"
 
-  escape_patt = P(dollar_temp) * P(".") * R("09")^1 / (key) ->
+  escape_patt = P(dollar_temp) * P("_") * R("09")^1 / (key) ->
     escapes[key] or error "bad key for unescape_cosmo"
 
   patt = Cs (escape_patt + P(1))^0 * P(-1)
@@ -84,8 +84,6 @@ write_exec = (cmd, content) ->
 
   fname
 
--- config command like this in site.moon:
--- require("renderers.markdown").cmd = "pandoc --mathjax >"
 class PandocRenderer extends require "sitegen.renderers.html"
   @escape_cosmo: escape_cosmo
   @unescape_cosmo: unescape_cosmo