Remove TABs from src

Will also make selftest to check that they aren't introduced

double 'the' removed

Follow-on fixes to changing Term to Parse.Term and Type to Parse.Type
in the quotation pre-processor. A mass of trivial changes, but the
new way of dealing with files containing code that does parsing
(not script files) is to

* grab the ambient grammar(s)
* set the current grammar(s) to the right values
for parsing quotations in the file
* the body of the file
* reset the current grammar to the ambient grammar

For an example, see src/taut/tautLib.sml

Fixes in order to remove library file dependencies on global grammars.

Trivial changes to accomodate parser upgrade.

Fixed to bring it up to date with Taupo release 0.
(Changes have come across from parse_branch development.)

Initial revision