__pragma__('js') bug?

Start by reproducing issue #766 with the two pragma('js') import examples, then trace the compiler's import-resolution step after the JavaScript file is generated. Compare the module-name handling for five- and six-character names, and verify that both examples compile without looking for a truncated Python or JavaScript filename.

In trying to use an ES6 style JavaScript import rather than the Node require() function, the js pragma fails if the import module name is more than 5 characters long.

So this transpiles as expected:

__pragma__('js','''import * as test from 'abcde';''')

But this fails:

__pragma__('js','''import * as test from 'abcdef';''')

giving this error:

Error while compiling (offending file last):
        File 'scratch_3', line 0, namely:
        
        Import error, can't find any of:
                /home/jennasys/.config/JetBrains/PyCharm2020.3/scratches/c.py
                /home/jennasys/.config/JetBrains/PyCharm2020.3/scratches/c.js
                /home/data/Python/Transcrypt/pymui/venv/lib/python3.7/site-packages/transcrypt/modules/c.py
                /home/data/Python/Transcrypt/pymui/venv/lib/python3.7/site-packages/transcrypt/modules/c.js
                /home/data/Python/Transcrypt/pymui/venv/bin/c.py
                /home/data/Python/Transcrypt/pymui/venv/bin/c.js
                /usr/lib/python3.7/c.py
                /usr/lib/python3.7/c.js
                /usr/lib/python3.7/lib-dynload/c.py
                /usr/lib/python3.7/lib-dynload/c.js
                /home/data/Python/Transcrypt/pymui/venv/lib/python3.7/site-packages/c.py
                /home/data/Python/Transcrypt/pymui/venv/lib/python3.7/site-packages/c.js
                /home/data/Python/Transcrypt/pymui/venv/lib/python3.7/site-packages/setuptools-40.8.0-py3.7.egg/c.py
                /home/data/Python/Transcrypt/pymui/venv/lib/python3.7/site-packages/setuptools-40.8.0-py3.7.egg/c.js
                /home/data/Python/Transcrypt/pymui/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/c.py
                /home/data/Python/Transcrypt/pymui/venv/lib/python3.7/site-packages/pip-19.0.3-py3.7.egg/c.js


Aborted

In the error, the "filename" it looks for is the name of the import module with the first 2 and last 3 characters removed. So similar to the above example, this:

__pragma__('js','''import * as test from 'abcdefghijk';''')

gives an error of:

Error while compiling (offending file last):
        File 'scratch_3', line 0, namely:
        
        Import error, can't find any of:
                /home/jennasys/.config/JetBrains/PyCharm2020.3/scratches/cdefgh.py
                /home/jennasys/.config/JetBrains/PyCharm2020.3/scratches/cdefgh.js

...

Update: It looks like the JavaScript file containing the ES6 import is actually being generated correctly and the compile error occurs at some point after that happens.