new files for exercises 7 and 8

ex7.rb

@@ -0,0 +1,25 @@
+puts "Mary had a little lamb."
+puts "Its fleece was white as %s." % 'snow'
+puts "And everywhere that Mary went."
+puts "." * 10  # what'd that do?
+
+end1 = "C"
+end2 = "h"
+end3 = "e"
+end4 = "e"
+end5 = "s"
+end6 = "e"
+end7 = "B"
+end8 = "u"
+end9 = "r"
+end10 = "g"
+end11 = "e"
+end12 = "r"
+
+# notice how we are using print instead of puts here.  change it to puts
+# and see what happens.
+print end1 + end2 + end3 + end4 + end5 + end6
+print end7 + end8 + end9 + end10 + end11 + end12
+
+# this just is polite use of the terminal, try removing it
+puts

ex8.rb

@@ -0,0 +1,12 @@
+formatter = "%s %s %s %s"
+
+puts formatter % [1, 2, 3, 4]
+puts formatter % ["one", "two", "three", "four"]
+puts formatter % [true, false, false, true]
+puts formatter % [formatter, formatter, formatter, formatter]
+puts formatter % [
+    "I had this thing.",
+    "That you could type up right.",
+    "But it didn't sing.",
+    "So I said goodnight."
+]