patch fixing coding standards "bugs"

Using the "coder" module, I found a number small "bugs" with regard to keeping the Drupal coding standards defined in these pages:

http://drupal.org/coding-standards

To summarize the fixes (so you don't have to run "coder" yourself):

• "if else" should be "ifelse"
• A number of lines used tabs or mixed tabs/spaces, should be only spaces
• There were a number of calls to l(check_plain(...), ...) where l() already calls check_plain()
• PHP constants like TRUE, FALSE, or NULL should be written upper-case
• dictionary.install was missing the @file block

This patch is against dictionary 1.1

Best regards!
David.