Fix typo in error_codes doc

diff --git a/src/librustc_error_codes/error_codes/E0081.md b/src/librustc_error_codes/error_codes/E0081.md
index fd5eca68e21fd5dc24be35b92c4fa4fccd0b2765..b834a734cefc447202d5a0dd2b64636f98fdf637 100644 (file)
--- a/src/librustc_error_codes/error_codes/E0081.md
+++ b/src/librustc_error_codes/error_codes/E0081.md
@@ -1,4 +1,4 @@
-A discrimant value is present more than once.
+A discriminant value is present more than once.
 
 Erroneous code example: