only associate a couple of functions as factories
for os.Error.

Replaces CL 35628 (abandoned).

R=rsc
DELTA=35  (26 added, 0 deleted, 9 changed)
OCL=35754
CL=35768

R=rsc
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=35743
CL=35762

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=35759
CL=35761

R=rsc
DELTA=160  (143 added, 5 deleted, 12 changed)
OCL=35748
CL=35758

R=rsc
APPROVED=rsc
DELTA=31  (1 added, 8 deleted, 22 changed)
OCL=35752
CL=35757

R=rsc
APPROVED=rsc
DELTA=30  (30 added, 0 deleted, 0 changed)
OCL=35751
CL=35756

R=rsc
APPROVED=rsc
DELTA=1  (0 added, 1 deleted, 0 changed)
OCL=35753
CL=35755

avoid infinite loop when cd fails.

TBR=r
OCL=35750
CL=35750

R=r
OCL=35736
CL=35746

R=gri
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=35737
CL=35745

R=r
DELTA=111  (0 added, 111 deleted, 0 changed)
OCL=35739
CL=35744

whose code can be accepted into the repository.

R=r
DELTA=44  (44 added, 0 deleted, 0 changed)
OCL=35729
CL=35742

R=r
DELTA=3706  (1857 added, 1849 deleted, 0 changed)
OCL=35731
CL=35741

R=r
DELTA=942  (471 added, 471 deleted, 0 changed)
OCL=35733
CL=35740

R=gri
DELTA=3006  (1503 added, 1503 deleted, 0 changed)
OCL=35730
CL=35735

R=go-dev
DELTA=111  (19 added, 38 deleted, 54 changed)
OCL=35722
CL=35728

R=r
DELTA=209  (65 added, 114 deleted, 30 changed)
OCL=35718
CL=35721

remove a mention of sawzall in the tutorial.

R=rsc
DELTA=36  (14 added, 4 deleted, 18 changed)
OCL=35717
CL=35719

R=rsc
APPROVED=rsc
DELTA=12  (11 added, 0 deleted, 1 changed)
OCL=35715
CL=35715

R=r
DELTA=30  (8 added, 15 deleted, 7 changed)
OCL=35677
CL=35713

R=rsc
DELTA=31  (5 added, 3 deleted, 23 changed)
OCL=35700
CL=35700

go can do the job just fine.

R=rsc
DELTA=290  (209 added, 13 deleted, 68 changed)
OCL=35699
CL=35699

R=rsc
DELTA=30  (0 added, 22 deleted, 8 changed)
OCL=35694
CL=35697

R=rsc
DELTA=555  (92 added, 38 deleted, 425 changed)
OCL=35691
CL=35693

R=r,rsc
APPROVED=r
DELTA=7  (5 added, 0 deleted, 2 changed)
OCL=35651
CL=35692

R=rsc
DELTA=1  (0 added, 1 deleted, 0 changed)
OCL=35685
CL=35687

R=rsc
APPROVED=rsc
DELTA=1459  (1459 added, 0 deleted, 0 changed)
OCL=35389
CL=35681

R=rsc
DELTA=209  (129 added, 24 deleted, 56 changed)
OCL=35675
CL=35680

fix a bug in makehtml - was deleting the output!

R=rsc
DELTA=11  (2 added, 0 deleted, 9 changed)
OCL=35672
CL=35674

ditto for heap.HeapInterface

R=gri,rsc
DELTA=31  (0 added, 1 deleted, 30 changed)
OCL=35665
CL=35673

remove the references to 6ar

R=rsc
DELTA=3547  (1770 added, 1775 deleted, 2 changed)
OCL=35669
CL=35671

*** Reason for rollback ***

roll back the changes to the tutorial programs (only) since they
break the automated processing used to create the tutorial.

*** Original change description ***

apply gofmt to the LGTM-marked files from 34501
that have not changed since I applied gofmt.

R=rsc
DELTA=139  (0 added, 44 deleted, 95 changed)
OCL=35670
CL=35670

R=rsc
DELTA=3  (1 added, 1 deleted, 1 changed)
OCL=35652
CL=35652

errors

R=rsc
DELTA=150  (74 added, 34 deleted, 42 changed)
OCL=35647
CL=35650

R=rsc
DELTA=15  (12 added, 2 deleted, 1 changed)
OCL=35641
CL=35645

  comments should now be indented properly in corner cases
  (at the end of statement lists, for instance)

- changed import decl. formatting as suggested by Russ (no "global"
  indentation of imports if there are renames present)

- better field list handling

- better documentation

R=rsc
DELTA=534  (324 added, 35 deleted, 175 changed)
OCL=35557
CL=35630

R=go-dev
DELTA=176  (39 added, 9 deleted, 128 changed)
OCL=35612
CL=35623

R=rsc,gri
DELTA=228  (223 added, 1 deleted, 4 changed)
OCL=35617
CL=35619

5g. fixes to 64 bit code gen. added (finally) function to do
shifts properly.

go/test: passes 83% (287/342)

R=rsc
APPROVED=rsc
DELTA=156  (50 added, 53 deleted, 53 changed)
OCL=35589
CL=35616

turn off testdclstack and "not used" errors
when there are syntax errors.

BUG=2181825
R=ken
OCL=35606
CL=35608