diff --git a/grammars/src/grammars/json.pest b/grammars/src/grammars/json.pest
index 413aa7b3..f51d1b0b 100644
--- a/grammars/src/grammars/json.pest
+++ b/grammars/src/grammars/json.pest
@@ -19,6 +19,10 @@ pair   = { string ~ ":" ~ value }
 
 array = { "[" ~ value ~ ("," ~ value)* ~ "]" | "[" ~ "]" }
 
+
+//////////////////////
+/// Matches value, e.g.: `"foo"`, `42`, `true`, `null`, `[]`, `{}`.
+//////////////////////
 value = { string | number | object | array | bool | null }
 
 string  = @{ "\"" ~ inner ~ "\"" }
diff --git a/meta/src/grammar.pest b/meta/src/grammar.pest
index 405ab396..cb02941d 100644
--- a/meta/src/grammar.pest
+++ b/meta/src/grammar.pest
@@ -171,6 +171,6 @@ space       = _{ " " | "\t" }
 /// A top-level comment.
 grammar_doc = ${ "//!" ~ space? ~ inner_doc }
 /// A rule comment.
-line_doc    = ${ "///" ~ space? ~ !"/" ~ inner_doc }
+line_doc    = ${ "///" ~ space? ~ inner_doc }
 /// A comment content.
 inner_doc   = @{ (!newline ~ ANY)* }