User Story 37654: Create Extensions base package

- Fixed multi-line variables to avoid all newlines.

Author: paulmedynski

eng/pipelines/stages/ci-build-extensions-package-stage.yml

@@ -83,13 +83,13 @@ stages:
 
         # dotnet CLI arguments common to all commands.
         - name: commonArguments
-          value: >
+          value: >-
             --verbosity ${{parameters.verbosity}}
             --artifacts-path $(dotnetArtifactsDir)
 
         # dotnet CLI arguments for build/test/pack commands
         - name: buildArguments
-          value: >
+          value: >-
             $(commonArguments)
             --configuration ${{parameters.buildConfiguration}}
             -p:BuildNumber=$(Build.BuildNumber)