1 files changed, 1 insertions, 1 deletions
diff --git a/spec.txt b/spec.txt
index 4a9e9fd..40d04f2 100644
--- a/spec.txt
+++ b/spec.txt
@@ -4030,7 +4030,7 @@ for efficient parsing strategies that do not backtrack:
 
     (a) it is not part of a sequence of four or more unescaped `_`s,
     (b) it is not followed by whitespace,
-    (c) is is not preceded by an ASCII alphanumeric character, and
+    (c) it is not preceded by an ASCII alphanumeric character, and
     (d) either it is not followed by a `_` character or it is
         followed immediately by strong emphasis.