1 files changed, 38 insertions, 0 deletions
diff --git a/usr.bin/learn/lib/files/L7.1a b/usr.bin/learn/lib/files/L7.1a
new file mode 100644
index 00000000000..871f82f26d4
--- /dev/null
+++ b/usr.bin/learn/lib/files/L7.1a
@@ -0,0 +1,38 @@
+#print
+Sometimes ? is too flexible, and you
+only want to allow a few characters.  For example,
+you might want to abbreviate
+  ls memo.ab memo.ac
+without picking up "memo.ad", memo.ae", etc.
+You can match one of a set of particular characters by 
+putting them in brackets "[]" in the list you use with "ls".
+For example,
+  [bc]
+matches either b or c but no other letters,
+so "ls memo.a[bc]" is the abbreviation for
+"ls memo.ab memo.ac".
+You can have as many characters as needed between [ and ].
+
+Type the "ls" command that recognizes
+  a1cat
+  a2cat
+  a3cat
+and no other files.  Then type "ready".
+#create a1bat
+#create a1cat
+#create a2cat
+#create a3cat
+#create a4cat
+#create acat
+#copyin
+#user
+#uncopyin
+#match ls a[123]cat
+#match ls a[1-3]cat
+#match ls a1cat a2cat a3cat
+You were supposed to use a[123]cat.
+Imagine doing it your way with 10 files.
+#log
+#next
+8.1a 10
+8.2a 5