Cutoff append/prepend overrides that come before assignment override

For example:

$ b x+=1 x=2 x+=3

Should result in '2 3', not '1 2 3'.

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/variable/override/testscript b/tests/variable/override/testscript
index 82b8e98..28225c1 100644
--- a/tests/variable/override/testscript
+++ b/tests/variable/override/testscript
@@ -56,6 +56,7 @@
 }
 
 : override-cached
+:
 : Test overriding cached target type/pattern-specific prepend/append
 :
 {
@@ -76,3 +77,31 @@
   1 a b X
   EOO
 }
+
+: order
+:
+{
+  : after
+  :
+  $* x=1 x+=2 x=+0 <<EOI >>EOO
+  print $x
+  EOI
+  0 1 2
+  EOO
+
+  : before
+  :
+  $* x+=2 x=+0 x=1 <<EOI >>EOO
+  print $x
+  EOI
+  1
+  EOO
+
+  : both
+  :
+  $* x=+0 x=1 x+=2 <<EOI >>EOO
+  print $x
+  EOI
+  1 2
+  EOO
+}