fixes backspace problem in python and gdb terminal

[iahmad-khan]

For cms-sw/cmssw#14575

[cmsbuild]

A new Pull Request was created by @iahmad-khan (Ijaz ahmad khan) for branch IB/CMSSW_8_1_X/gcc530.

@cmsbuild, @smuzaffar, @Degano, @iahmad-khan, @davidlange6 can you please review it and eventually sign? Thanks.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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[iahmad-khan]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/cmsdist-test-pr/348/console

[cmsbuild]

-1

Tested at: 40decd3

You can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2540/348/summary.html

I found follow errors while testing this PR

Failed tests: UnitTests

• Unit Tests:

I found errors in the following unit tests:

[smuzaffar]

looks good, unit tests were timed out after 2 hours as this Pr nearly build the full release due to python change.

[smuzaffar]

also looks like it also fixed the

Name collision 'ansi' between
    ansi|ansi/pc-term compatible with color
and ansi|ansi/pc-term compatible with color
...now  ansi/pc-term compatible with color
Cannot remove alias 'ansi/pc-term compatible with color'

type warnings.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2540/348/summary.html