Clean up E0647 explanation

diff --git a/src/librustc_error_codes/error_codes/E0647.md b/src/librustc_error_codes/error_codes/E0647.md
index 131db38c00d2e8894644dcb90b0f24128b169402..8ca6e777f301da4d21b1750a07b802f8d47ab946 100644 (file)
--- a/src/librustc_error_codes/error_codes/E0647.md
+++ b/src/librustc_error_codes/error_codes/E0647.md
@@ -1,4 +1,5 @@
-It is not possible to define `start` with a where clause.
+The `start` function was defined with a where clause.
+
 Erroneous code example:
 
 ```compile_fail,E0647