add missing header end comments

- ensures a consistent usage in header files
- also add a blank line after the copyright header where missing
- also remove orphan new-lines at the end of some files

1 files changed, 1 insertions, 1 deletions

diff --git a/src/key.h b/src/key.h
index 11dc65de8c..552f12ad23 100644
--- a/src/key.h
+++ b/src/key.h
@@ -309,4 +309,4 @@ struct CExtKey {
 /** Check that required EC support is available at runtime */
 bool ECC_InitSanityCheck(void);
 
-#endif
+#endif // BITCOIN_KEY_H