Fix to add -n opiton for echo

[ffjlabo]

What this PR does / why we need it:

Added -n option to avoid the unexpected base64 encoded value.
The echo command adds \n at the end of the output by default. We can remove it by adding the option -n.

DESCRIPTION
     The echo utility writes any specified operands, separated by single blank (‘ ') characters and followed by a
     newline ('\n') character, to the standard output.

     -n    Do not print the trailing newline character.  This may also be achieved by appending ‘\c’ to the end of the
           string, as is done by iBCS2 compatible systems.  Note that this option as well as the effect of ‘\c’ are
           implementation-defined in IEEE Std 1003.1-2001 (“POSIX.1”) as amended by Cor. 1-2002.  Applications aiming
           for maximum portability are strongly encouraged to use printf(1) to suppress the newline character.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.30%. Comparing base (340b6df) to head (e2be37c).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4913      +/-   ##
==========================================
- Coverage   29.32%   29.30%   -0.02%     
==========================================
  Files         321      321              
  Lines       40835    40835              
==========================================
- Hits        11974    11968       -6     
- Misses      27904    27910       +6     
  Partials      957      957              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[khanhtc1202]

👍

[t-kikuc]

thanks!!