Fixed a couple case sensitivity bugs and added an example

Bugs fixed:
- Case-sensitive parsing was completely broken, this has been fixed
- <Ctrl>+D to quit wasn't working when case-sensitive parsing was enabled, this is fixed

Added a "case_sensitive.py" example in the examples directory for quickly testing case-sensitive command parsing behavior.

Author: tleonhardt

cmd2.py

@@ -891,13 +891,13 @@ def pseudo_raw_input(self, prompt):
             try:
                 line = sm.input(safe_prompt)
             except EOFError:
-                line = 'EOF'
+                line = 'eof'
         else:
             self.stdout.write(safe_prompt)
             self.stdout.flush()
             line = self.stdin.readline()
             if not len(line):
-                line = 'EOF'
+                line = 'eof'
             else:
                 line = line.rstrip('\r\n')
 
@@ -1846,6 +1846,10 @@ def _build_main_parser(self, redirector, terminators, multilineCommands, legalCh
         if case_insensitive:
             multilineCommand.setParseAction(lambda x: x[0].lower())
             oneline_command.setParseAction(lambda x: x[0].lower())
+        else:
+            multilineCommand.setParseAction(lambda x: x[0])
+            oneline_command.setParseAction(lambda x: x[0])
+
         if blankLinesAllowed:
             blankLineTerminationParser = pyparsing.NoMatch
         else:

examples/case_sensitive.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+# coding=utf-8
+"""A sample application demonstrating when commands are set to be case sensitive.
+
+By default cmd2 parses commands in a case-insensitive manner.  But this behavior can be changed.
+"""
+
+import cmd2
+
+
+class CaseSensitiveApp(cmd2.Cmd):
+    """ Example cmd2 application where commands are case-sensitive."""
+
+    def __init__(self):
+        # Set this before calling the super class __init__()
+        self.case_insensitive = False
+
+        cmd2.Cmd.__init__(self)
+
+        self.debug = True
+
+
+if __name__ == '__main__':
+    app = CaseSensitiveApp()
+    app.cmdloop()