Util funcs used by lib/hashes.nim and compiler/lexer.nim

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diff --git a/lib/pure/etcpriv.nim b/lib/pure/etcpriv.nim
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+#
+#
+#            Nim's Runtime Library
+#        (c) Copyright 2015 Nim Authors
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+## This module contains utils that are less then easy to categorize and
+## don't really warrant a specific module. They are private to compiler
+## and stdlib usage, and should not be used outside of that - they may
+## change or disappear at any time.
+
+
+# Used by pure/hashes.nim, and the compiler parsing
+const magicIdentSeparatorRuneByteWidth* = 3
+
+# Used by pure/hashes.nim, and the compiler parsing
+proc isMagicIdentSeparatorRune*(cs: cstring, i: int): bool  {. inline } =
+  result =  cs[i] == '\226' and 
+            cs[i + 1] == '\128' and
+            cs[i + 2] == '\147'     # en-dash  # 145 = nb-hyphen