use space to replace tab and remove meaningless space in the end of each line

[mysterywolf]

use space to replace tab and remove meaningless space in the end of each line

Description

1. use Space(4 spaces) to replace Tab to prevent that there are Spaces and Tab mixed in files.
2. remove meaningless space in the end of each line

Test Steps

Related Issue

negative

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[codecov]

Codecov Report

Merging #310 (17a678c) into main (99295c9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #310   +/-   ##
=======================================
  Coverage   90.60%   90.60%           
=======================================
  Files           3        3           
  Lines         532      532           
  Branches      142      142           
=======================================
  Hits          482      482           
  Misses         14       14           
  Partials       36       36           

Flag	Coverage Δ
unittests	90.60% <ø> (ø)

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[AniruddhaKanhere]

Hello @mysterywolf,

First of all, thank you for this PR!

All these changes seem to be very harmless. But, there is a catch: in the past, we have tried doing this but it broke some of the toolchains. Some of the toolchains don't handle the changing of tabs to spaces very well.

So, here is what I would recommend as a path forward:

• We can easily accept changes that are not in the portable directory like the ones in include/croutine.h.
• But for the changes in the portable directory, we would require that it should be done one port at a time. The rationale being that if something breaks, we can roll back the change easily without affecting other changes. And it'll be easier to test and review.
• In essence, there should be multiple PRs touching one port at a time.

Thanks again! Do ask if you have any questions or concerns.

[mysterywolf]

OK thanks for you recommend, I will ignore portable directory (except portable/MemMang), and deal with other files.