Correct comments in testdir makefiles. (John Beckett)
diff --git a/src/testdir/Make_amiga.mak b/src/testdir/Make_amiga.mak
index bc9638c..59c616d 100644
--- a/src/testdir/Make_amiga.mak
+++ b/src/testdir/Make_amiga.mak
@@ -1,5 +1,5 @@
 #
-# Makefile to run al tests for Vim, on Amiga
+# Makefile to run all tests for Vim, on Amiga
 #
 # Requires "rm", "csh" and "diff"!