Fix assorted docstrings

[nmnobre]

In addition to these small typos I found while revising #1554, I also noticed that the example we give for ACCEnterDataTrans wouldn't actually add the directive by lack of a kernels/parallel construct in the schedule. Is this what we intended?

[codecov[bot]]

Codecov Report

Base: 99.51% // Head: 99.51% // No change to project coverage :thumbsup:

Coverage data is based on head (2918cb4) compared to base (07d62f6). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1846   +/-   ##
=======================================
  Coverage   99.51%   99.51%           
=======================================
  Files         269      269           
  Lines       39380    39380           
=======================================
  Hits        39188    39188           
  Misses        192      192           

Impacted Files	Coverage Δ
src/psyclone/psyir/nodes/node.py	97.33% <ø> (ø)
src/psyclone/transformations.py	99.29% <ø> (ø)

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[arporter]

I also noticed that the example we give for ACCEnterDataTrans wouldn't actually add the directive by lack of a kernels/parallel construct in the schedule. Is this what we intended?

Oops, no! Would you mind fixing it in this PR?

[nmnobre]

Should we change SOURCE_FILE to, say, GOCEAN_SOURCE_FILE and start using, say, NEMO_SOURCE_FILE instead of tra_adv.F90 directly?

[arporter]

Should we change SOURCE_FILE to, say, GOCEAN_SOURCE_FILE and start using, say, NEMO_SOURCE_FILE instead of tra_adv.F90 directly?

Yes, that's a good idea.

[nmnobre]

Should we change SOURCE_FILE to, say, GOCEAN_SOURCE_FILE and start using, say, NEMO_SOURCE_FILE instead of tra_adv.F90 directly?

Yes, that's a good idea.

Done. This whole PR was a bit harder than I thought it'd be!