java/1141: don't use StringBuffer for string concatenation

[tromey@gcc.gnu.org]

Synopsis: don't use StringBuffer for string concatenation

State-Changed-From-To: open->analyzed
State-Changed-By: tromey
State-Changed-When: Fri Nov 23 19:42:05 2001
State-Changed-Why:
    I tried this tonight, and it didn't have a positive
    performance impact.
      http://gcc.gnu.org/ml/java/2001-11/msg00180.html
    However, I didn't try stack allocation of the StringBuffer.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=1141&database=gcc