[Unix(Ubuntu/MacOS)] bal dist pull command gives unexpected error text when the current update tool version is not the latest

[NipunaMadhushan]

Label: High Priority

Description:
When we run the bal dist pull <distribution> command in Ubuntu or MacOS, it gives unexpected error text as follows. But the bal command runs without any issue after that. (Tested Version of Update Tool - 1.3.7-rc1, Latest version - 1.3.6)

Checking for newer versions of the update tool...
Downloading ballerina-command-1.3.6 100% [==========] 1/1 MB (0:00:00 / 0:00:0
Updating environment variables
The ‘ballerina’ command was changed to ‘bal’. Please use ‘bal’ command from now onwards.
Ie : $ bal build
     $ bal dist list
     $ bal dist update
Update tool version updated to the latest version: 1.3.6
Cleaning old files...

Update successfully completed

Fetching the 'slbeta5' distribution from the remote server...
Downloading slbeta5 100% [===================] 179/179 MB (0:01:10 / 0:00:00) 

Fetching the dependencies for 'slbeta5' from the remote server...
Dependency 'jdk-11.0.8+10-jre' is already available locally
'slbeta5' successfully set as the active distribution
/Library/Ballerina/bin/bal: line 131: unexpected EOF while looking for matching `"'
/Library/Ballerina/bin/bal: line 136: syntax error: unexpected end of file

Steps to reproduce:
Run the following command as a given distribution version exists or not exists.
bal dist pull <distribution>

Affected Versions:
Update Tool Version - 1.3.7-rc1

[udda1996]

Closing since this is fixed with #266

[github-actions]

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      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
      - Reason/MultipleComponentInteraction - Issue occured due to interactions in multiple components.
      - Reason/Complex - Issue occurred due to complex scenario.
      - Reason/Invalid - Issue is invalid.
      - Reason/Other - None of the above cases.