Merged PR 419227: Anaconda: need to use call activate in a Batch sc…

…ript

🦶🔫

See conda/conda#794

**Preview:** https://review.docs.microsoft.com/azure/devops/pipelines/languages/python?view=azdevserver-2019&branch=users%2Fbrcrista%2Fconda-call-activate

Related work items: #1413876

docs/pipelines/languages/python.md

@@ -164,12 +164,12 @@ When you run a script in a later step after creating an Anaconda environment, yo
 
 ```yaml
 - script: |
-    activate myEnvironment
+    call activate myEnvironment
     pytest -m unit --junitxml=junit/unit-test.xml
   displayName: 'Unit tests'
 
 - script: |
-    activate myEnvironment
+    call activate myEnvironment
     pytest -m integration --junitxml=junit/integration-test.xml
   displayName: 'Integration tests'
 ```
@@ -219,13 +219,37 @@ After updating `pip` and friends, a typical next step is to install from `requir
 
 ### Install Anaconda packages with conda
 
-Add the following YAML to install the `scipy` package in the conda environment named `myEnvironment`. See [Activate an Anaconda environment](#activate-an-anaconda-environment) above.
+Add the following YAML to install the `scipy` package in the conda environment named `myEnvironment`.
+
+# [Hosted Ubuntu 16.04](#tab/ubuntu-16-04)
 
 ```yaml
-- script: conda install -n myEnvironment scipy
+- bash: |
+    source activate myEnvironment
+    conda install -n myEnvironment scipy
   displayName: 'Install conda libraries'
 ```
 
+# [Hosted macOS](#tab/macos)
+
+```yaml
+- bash: |
+    source activate myEnvironment
+    conda install -n myEnvironment scipy
+  displayName: 'Install conda libraries'
+```
+
+# [Hosted VS2017](#tab/vs2017)
+
+```yaml
+- script: |
+    call activate myEnvironment
+    conda install -n myEnvironment scipy
+  displayName: 'Install conda libraries'
+```
+
+---
+
 ## Test
 
 ### Run lint tests with Flake8
@@ -258,7 +282,7 @@ Add the [Publish Test Results](../tasks/test/publish-test-results.md) task to pu
 
 ```yaml
 - task: PublishTestResults@2
-  condition: succeededOrFailed()
+  condition: succeededOrFailed()
   inputs:
     testResultsFiles: '**/test-*.xml'
     testRunTitle: 'Publish test results for Python $(python.version)'