Problem:    Code is indented more than necessary.
Solution:   Use an early return where it makes sense. (Yegappan Lakshmanan,
            closes #11792)

Problem:    Code uses too much indent.
Solution:   Use an early return. (Yegappan Lakshmanan, closes #11747)

Problem:    May not be able to use a pattern ad the debug prompt.
Solution:   Temporarily disable the timeout. (closes #11164)

Problem:    Various small issues.
Solution:   Various small fixes.

Problem:    Function called at debug prompt is also debugged.
Solution:   Reset the debug level while entering the debug command.
            (closes #11118)

Problem:    Redraw flags are not named specifically.
Solution:   Prefix "UPD_" to the flags, for UPDate_screen().

Problem:    Various white space and cosmetic mistakes.
Solution:   Change spaces to tabs, improve comments.

Problem:    The mode #defines are not clearly named.
Solution:   Prepend MODE_.  Renumber them to put the mapped modes first.

Problem:    Debugger test fails when breaking on expression.
Solution:   Compare strings with "==" instead of "is".

Problem:    Error messages are spread out.
Solution:   Move more errors to errors.h.