Many variant versions of functions were not documented in this chapter, and the PyCompilerFlags structure was not documented at all.

This patch fixes that.  It adds documentation for:
+\begin{cfuncdesc}{int}{PyRun_AnyFileFlags}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{int}{PyRun_AnyFileEx}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{int}{PyRun_AnyFileExFlags}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{int}{PyRun_SimpleStringFlags}{const char *command,
+\begin{cfuncdesc}{int}{PyRun_SimpleFileFlags}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{int}{PyRun_SimpleFileEx}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{int}{PyRun_SimpleFileExFlags}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{int}{PyRun_InteractiveOneFlags}{FILE *fp,
+\begin{cfuncdesc}{int}{PyRun_InteractiveLoopFlags}{FILE *fp, 
+\begin{cfuncdesc}{struct _node*}{PyParser_SimpleParseStringFlags}{
+\begin{cfuncdesc}{struct _node*}{PyParser_SimpleParseStringFlagsFilename}{
+\begin{cfuncdesc}{struct _node*}{PyParser_SimpleParseFileFlags}{FILE *fp,
+\begin{cfuncdesc}{PyObject*}{PyRun_StringFlags}{const char *str, int start,
+\begin{cfuncdesc}{PyObject*}{PyRun_FileEx}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{PyObject*}{PyRun_FileFlags}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{PyObject*}{PyRun_FileExFlags}{FILE *fp, const char *filename,
+\begin{cfuncdesc}{PyObject*}{Py_CompileStringFlags}{char *str,
+\begin{ctypedesc}[PyCompilerFlags]{struct PyCompilerFlags}
+\begin{cvardesc}{int}{CO_FUTURE_DIVISION}

This patch also reflects the "const"ness of arguments to these functions.

latex seemed to process the modified documentation just fine.

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Committed a slightly modified version of the patch as
Doc/api/veryhigh.tex 1.2.