void table_colpad(file, string, width, precision, type)
Output string to the file in a column of width characters. If precision is non-zero, the output is right justified as a number with the "." precision characters from the right edge of the column. Otherwise string is left justified. The type may override the default justification with one of the following \defined values:
* TAB_DEFAULT * TAB_LEFT * TAB_RIGHT * TAB_CENTER * TAB_SKIP
This is a low level routine to output one table column at a time with the proper justification. User programs should call table_put.