Hello,

See https://github.com/sagemath/sagenb/pull/290#event-206993817 and links 
from there for details and examples.

Basically, notebook cells have whitespace stripped from the beginning and 
the end (of the whole cell, not each line). This leads to problems with 
languages that require some spacing in front, like Fortran in this case, 
and can lead to strange results with other languages where indentation 
matters, like Python. The proposed fix for Fortran is to detect that this 
is Fortran and do only right stripping, not left.

It seems to me that there should be no such stripping at all - don't mess 
with the code in a language you don't know! It is like autocorrection 
enabled by default that will "fix" your writing just because it does not 
understand that it is already correct. (Last summer I wasted a lot of time 
because password capitalization was changed by autocorrector.)

Note that this issue is actually orthogonal to supporting "block 
dedent"/"prompt stripping" which is useful for copy-pasting examples from 
documentation that will all start with "sage:"

Does anyone have arguments to keep stripping?

Thank you,
Andrey

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