From e672d422d902119f05f58165c735eb82bfab6adc Mon Sep 17 00:00:00 2001
From: Paul Vojta <vojta@math.berkeley.edu>
Date: Tue, 16 Aug 2022 18:32:24 -0700
Subject: [PATCH 1/3] Fix bug:  "my $xtail;" declared twice

---
 OpenProblemLibrary/macros/FortLewis/VectorField2D.pl | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/OpenProblemLibrary/macros/FortLewis/VectorField2D.pl b/OpenProblemLibrary/macros/FortLewis/VectorField2D.pl
index 23cbf5d5a2..0f13640ab6 100755
--- a/OpenProblemLibrary/macros/FortLewis/VectorField2D.pl
+++ b/OpenProblemLibrary/macros/FortLewis/VectorField2D.pl
@@ -53,7 +53,6 @@ sub VectorField2D {
 my $FX;
 my $FY;
 my $xtip;
-my $xtail;
 my $xstem;
 my $ystem;
 my $xmidtip;
@@ -108,4 +107,4 @@ sub VectorField2D {
 
 }
 
-1;
\ No newline at end of file
+1;

From 06293ca96aed172199f4e8f6b1c5fb7e3731f5b2 Mon Sep 17 00:00:00 2001
From: Paul Vojta <vojta@math.berkeley.edu>
Date: Tue, 16 Aug 2022 18:34:59 -0700
Subject: [PATCH 2/3] Remove functions max and min (they're already defined by
 loading PGstandard.pl).

---
 .../macros/Alfred/Alfredmacros.pl             | 30 ++++++++++---------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/OpenProblemLibrary/macros/Alfred/Alfredmacros.pl b/OpenProblemLibrary/macros/Alfred/Alfredmacros.pl
index 3a9ce4fbd7..239ca04c02 100755
--- a/OpenProblemLibrary/macros/Alfred/Alfredmacros.pl
+++ b/OpenProblemLibrary/macros/Alfred/Alfredmacros.pl
@@ -27,20 +27,22 @@ sub inversetrig
 }
 
 ## Compute the max and min of an array of numbers
-sub max {
-my $maximum = shift @_;
-foreach(@_){
-   if ($maximum < $_){$maximum = $_};
-};
-return $maximum;
-} 
-sub min {
-my $minimum = shift @_;
-foreach(@_){
-   if ($minimum > $_){$minimum =  $_};
-};
-return $minimum;
-} 
+## Deleted (max and min are provided by PGauxiliaryFunctions.pl,
+## which is loaded by PGstandard.pl in every problem).
+#sub max {
+#my $maximum = shift @_;
+#foreach(@_){
+#   if ($maximum < $_){$maximum = $_};
+#};
+#return $maximum;
+#}
+#sub min {
+#my $minimum = shift @_;
+#foreach(@_){
+#   if ($minimum > $_){$minimum =  $_};
+#};
+#return $minimum;
+#}
 
 
 

From ffcb631b099796cadd416c40a2cd749bf77cc3de Mon Sep 17 00:00:00 2001
From: "K. Andrew Parker" <kparker@citytech.cuny.edu>
Date: Fri, 19 Aug 2022 11:06:38 -0400
Subject: [PATCH 3/3] Delete redundant subroutines

---
 OpenProblemLibrary/macros/Alfred/Alfredmacros.pl | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/OpenProblemLibrary/macros/Alfred/Alfredmacros.pl b/OpenProblemLibrary/macros/Alfred/Alfredmacros.pl
index 239ca04c02..de0871b50a 100755
--- a/OpenProblemLibrary/macros/Alfred/Alfredmacros.pl
+++ b/OpenProblemLibrary/macros/Alfred/Alfredmacros.pl
@@ -27,22 +27,6 @@ sub inversetrig
 }
 
 ## Compute the max and min of an array of numbers
-## Deleted (max and min are provided by PGauxiliaryFunctions.pl,
-## which is loaded by PGstandard.pl in every problem).
-#sub max {
-#my $maximum = shift @_;
-#foreach(@_){
-#   if ($maximum < $_){$maximum = $_};
-#};
-#return $maximum;
-#}
-#sub min {
-#my $minimum = shift @_;
-#foreach(@_){
-#   if ($minimum > $_){$minimum =  $_};
-#};
-#return $minimum;
-#}