Add vim encoding and folding marker

src/prng/wapp_prng.c

@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_PRNG_C
 #define WAPP_PRNG_C
 

src/prng/wapp_prng.h

@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_PRNG_H
 #define WAPP_PRNG_H
 

src/prng/xorshift/xorshift.c

@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "xorshift.h"
 #include "../../common/aliases/aliases.h"
 #include "../../common/platform/platform.h"

src/prng/xorshift/xorshift.h

@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef XORSHIFT_H
 #define XORSHIFT_H