import BTL learn(1) lessons/files

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diff --git a/usr.bin/learn/lib/files/L6.2a b/usr.bin/learn/lib/files/L6.2a
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+#print
+Since the '?' character only matches single
+characters in file names, it is not useful for
+questions like "how many files have names which
+begin with the letter g?"  There is another character
+  *
+which can be used in patterns for file names
+and matches any number of any kind of characters.
+So
+  g*
+selects all file names beginning with g, and
+  *x
+selects all file names which end in x.  Try
+  ls *x
+How many files match?
+Compare with an ordinary
+  ls
+if you like.  Type "answer N" eventually where
+N is the number of files whose names end in "x".
+#create abcx
+#create abcxdef
+#create memox
+#create memoy
+#create memoz
+#create x
+#create x53x
+#copyin
+#user
+#uncopyin
+#match 4
+#log
+#next
+6.2b 8
+6.1a 1