- rewrite declaration printing to take full use of discardable tabwriter columns

- rewrite declaration printing to take full use of discardable tabwriter columns
- honor line breaks in multi-line expressions
- do not add extra indentation to multi-line string lists
- don't put blanks around simple function calls and conversions
- do not modify `` strings
- added extra test cases

R=rsc
DELTA=398  (246 added, 51 deleted, 101 changed)
OCL=35453
CL=35465