touchup readme

Author: maurymarkowitz

README.MD

@@ -46,9 +46,9 @@ Short options with no parameters can be ganged, for instance, `-nt`.
 
 There are two changes in the command-line interface on windows, to better support existing NEC-2 workflows.
 
-The first is that running the `onec.exe` with no command line switches or positional arguments will instead expect to be fed input from `CONIN$` (the windows `stdin`). The input should contain two lines of text, the first having the input filename, and the second the output filename. These 
+The first is that running the `onec.exe` with no command line switches or positional arguments will instead expect to be fed input from `CONIN$` (the windows `stdin`). The input should contain two lines of text, the first having the input filename, and the second the output filename. If the file is not passed in, the program will wait forever, so use cntr-C to abort if you have to.
 
-`/?`: same as `-h`, included for c
+The only other change is to add the `/?` command line switch, the same as `-h`.
 
 Examples
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