tcsh: Fix autocompletion for no single-hyphen args

[simaoafonso-pwt]

If the parser has no single-hyphen options, the tcsh template would
generate a syntax error.

Include a hack to that the autocompletion for the double-hyphen
selection does not add an extra space at the end.

---

Another fix to the tcsh template support, see #56 #57 #58

[codecov-commenter]

Codecov Report

Patch coverage: 66.66% and project coverage change: -0.19 ⚠️

Comparison is base (ed933a6) 91.06% compared to head (336c7ad) 90.88%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #112      +/-   ##
==========================================
- Coverage   91.06%   90.88%   -0.19%     
==========================================
  Files           3        3              
  Lines         347      351       +4     
==========================================
+ Hits          316      319       +3     
- Misses         31       32       +1     

Impacted Files	Coverage Δ
shtab/__init__.py	93.11% <66.66%> (-0.25%)	⬇️

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[casperdcl]

This seems to break things a little (at least on bash).

before:

main$ eval "$(PYTHONPATH=. python examples/customcomplete.py completion bash)"
main$ customcomplete <TAB>
completion  process

after:

fix-singlehyphen$ eval "$(PYTHONPATH=. python examples/customcomplete.py completion bash)"
fix-singlehyphen$ customcomplete <TAB>
fix-singlehyphen$ customcomplete completion <TAB>
fix-singlehyphen$ customcomplete completion bash

[simaoafonso-pwt]

This seems to break things a little (at least on bash).

That's weird, I only changed the csh function, and this commit to avoid test failures.

b05c0c7

I should rebase and retest this.

[simaoafonso-pwt]

Rebased and re-tested, including that test you mentioned, works for me.

[simaoafonso-pwt]

Rebased and re-tested, including that test you mentioned, works for me.

Sounds like the test failure is not my fault, pydoc-markdown cannot run correctly on PyPy?

[casperdcl]

Thanks! Rebased now over #139 (should merge that first). Better now?

[simaoafonso-pwt]

LGTM, you can merge this.

[casperdcl]

lgtm; thanks!

I removed the examples/doublecomplete.py since it seems more about debugging/testing.

Maybe worth adding a follow-up test (in tests/test_shtab.py) instead.