exercise_readme: explain options for upgrading

ashaindlin · Aug 1, 2021 · 2a29d9a · 2a29d9a
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diff --git a/config/exercise_readme.go.tmpl b/config/exercise_readme.go.tmpl
@@ -34,7 +34,13 @@ RedownloadInvalidResponse Request {
 ```
 
 You are probably running an old stack version and need
-to upgrade it.
+to upgrade it. Try running:
+
+```bash
+stack upgrade
+```
+
+Or see other options for upgrading at [Stack documentation](https://docs.haskellstack.org/en/stable/install_and_upgrade/#upgrade).
 
 #### Otherwise, if you get an error message like this...
 

diff --git a/exercises/shared/.docs/tests.md b/exercises/shared/.docs/tests.md
@@ -22,7 +22,13 @@ RedownloadInvalidResponse Request {
 ```
 
 You are probably running an old stack version and need
-to upgrade it.
+to upgrade it. Try running:
+
+```bash
+stack upgrade
+```
+
+Or see other options for upgrading at [Stack documentation](https://docs.haskellstack.org/en/stable/install_and_upgrade/#upgrade).
 
 #### Otherwise, if you get an error message like this...