Stop convert generating single space filenames
And remove stupid backtick quotes from filenames

diff --git a/MagickCore/compress.c b/MagickCore/compress.c
index 3de4ae6..0b099be 100644
--- a/MagickCore/compress.c
+++ b/MagickCore/compress.c
@@ -1305,7 +1305,7 @@
   if (image->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
   (void) ThrowMagickException(exception,GetMagickModule(),MissingDelegateError,
-    "DelegateLibrarySupportNotBuiltIn","`%s' (ZIP)",image->filename);
+    "DelegateLibrarySupportNotBuiltIn","'%s' (ZIP)",image->filename);
   return(MagickFalse);
 }
 #endif