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+.TH ANSI2KNR 1 "31 December 1990" 
+.SH NAME
+ansi2knr \- convert ANSI C to Kernighan & Ritchie C
+.SH SYNOPSIS
+.I ansi2knr
+input_file output_file
+.SH DESCRIPTION
+If no output_file is supplied, output goes to stdout.
+.br
+There are no error messages.
+.sp
+.I ansi2knr
+recognizes functions by seeing a non-keyword identifier at the left margin, followed by a left parenthesis, with a right parenthesis as the last character on the line.  It will recognize a multi-line header if the last character on each line but the last is a left parenthesis or comma.  These algorithms ignore whitespace and comments, except that the function name must be the first thing on the line.
+.sp
+The following constructs will confuse it:
+.br
+     - Any other construct that starts at the left margin and follows the above syntax (such as a macro or function call).
+.br
+     - Macros that tinker with the syntax of the function header.