Better checking of the arguments, and reduce the degree in case the
defining lists contain trailing fixed points.

Make functions more robust by checking their args, remove randomness
from test files, and ensure 100% code coverage.

Remove trailing whitespace and use uniform code formatting.

Make functions more robust by checking their args, remove randomness
from test files, and ensure 100% code coverage.

The new method has lower complexity than the old method, which was
rubbish.

To avoid duplicate code.

Remove trailing whitespace and use uniform code formatting.

Make functions more robust by checking their args, remove randomness
from test files, and ensure 100% code coverage.

Remove trailing whitespace and use uniform code formatting.

To keep the compiler happy

The new method is a bit faster and uses less memory.

And tests for COMPONENTS_TRANS and NR_COMPONENTS_TRANS. Also update
NR_COMPONENTS_TRANS to give an error if the arg is not a transformation.

The output of the previous code was not well-defined, or used, so I
removed it.

and add tests for these.

and tests.

So that functions with related functionality are next to each other, in
clearly marked sections.

Rename:
  * IMAGE_TRANS -> IMAGE_LIST_TRANS_INT
  * PERM_LEFT_QUO_TRANS_NC -> PermLeftQuoTransformationNC
  * INV_TRANS -> InverseOfTransformation

Remove the GAP versions of the last two, and update the tests.

For the sake of robustness.

Remove redundant code, improve error message, and make it so that the
error can actually be shown. Plus test for this. Also make it so that
PowIntTrans2/4 work for T_INTPOS.

Previously OnSetsTrans didn't work for T_INTPOS now it does

To remove duplicate code and to remove the assumption that a T_TRANS4
always has degree strictly greater than a T_TRANS2.

Remove the assumption that we are always acting on immediate positive
integers, remove incorrect retyping at the end of the function, add an
error message for lists with unbound entries, and change the condition
to that holes in lists don't cause a seg fault.

Removed duplicate code for sorting and removing duplicates, added error
if the arg is not a transformation.

To cover all cases and reduce the code length. Previously this included
the assumption that a T_TRANS4 always has degree strictly greater than a
T_TRANS2, this commit removes this assumption.

And remove some redundant variables.

Namely those of the identity, and a permutation.

Remove unnecessary GAP level versions of C functions, and rename the
C function for:

* RESTRICTED_TRANS -> RestrictedTransformationNC
* PERM_IMG_TRANS -> PermutationOfImage
* IS_INJECTIVE_LIST_TRANS -> IsInjectiveListTrans
* INDEX_PERIOD_TRANS -> IndexPeriodOfTransformation

and properly check their arguments.

Remove now redundant code, declarations, fix minor problems, and add
checks.

and rename RestrictedTransformationNC -> RestrictedTransformation, since
the C function anyway checks its args fully.

This file contains the old tests for transformations.