Use TextIOWrapper.detach() instead of NoCloseStream

Usage and this pattern is discussed in Python bug: https://bugs.python.org/issue21363

src/PIL/EpsImagePlugin.py

@@ -357,22 +357,14 @@ def _save(im, fp, filename, eps=1):
     else:
         raise ValueError("image mode is not supported")
 
-    class NoCloseStream(object):
-        def __init__(self, fp):
-            self.fp = fp
-
-        def __getattr__(self, name):
-            return getattr(self.fp, name)
-
-        def close(self):
-            pass
-
     base_fp = fp
+    wrapped_fp = False
     if fp != sys.stdout:
-        fp = NoCloseStream(fp)
         if sys.version_info.major > 2:
             fp = io.TextIOWrapper(fp, encoding='latin-1')
+            wrapped_fp = True
 
+    try:
         if eps:
             #
             # write EPS header
@@ -405,6 +397,9 @@ def _save(im, fp, filename, eps=1):
         fp.write("grestore end\n")
         if hasattr(fp, "flush"):
             fp.flush()
+    finally:
+        if wrapped_fp:
+            fp.detach()
 
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