minor updates to docs

Author: JohnCremona

doc/mwrank/mwrank.changes

@@ -1,8 +1,7 @@
 	MWRANK MAJOR CHANGES MADE (other than bug fixes)
 
-NB This file is incomplete, as I sometimes forget to update it, but
-should log the major changes.
-
+NB This file has not been updated since 2006.  See git logs for all
+more recent changes to eclib, including mwrank itself.
 
 Oct 2006
 ========

doc/mwrank/mwrank.info

@@ -229,9 +229,9 @@ using (unless you use the quiet flag "-q").
 
 I no longer distribute binaries.
 
-It is recommended that you use the multi-precision version for curves
-with large coefficients; otherwise results may be wrong.  This is the
-default and requires no special configuration.
+It is recommended that you use the multi-precision floating point
+version for curves with large coefficients; otherwise results may be
+wrong.  This is the default and requires no special configuration.
 
 You can aid the factorization of large integers in several ways:
 

doc/mwrank/mwrank.options

@@ -93,7 +93,7 @@ List of command line options, their meaning and default values (set in options.h
 			0: do no saturation at all
 			n: use n as upper bound for saturation primes
 			-1: allow progam to determine upper bound
-			autimatically (but that will be reduced to a
+			automatically (but that will be reduced to a
 			default maximum of 100 if it is greater)
 
 Last update: 2016-01-02