Fix tests.

Author: literatesnow

internal/devbox/testdata/shellrc/basic/shellrc.golden

@@ -8,7 +8,8 @@ export simple="value";
 export space="quote me";
 export special="\$\`\"\\";
 
-# Prepend to the prompt to make it clear we're in a devbox shell.
+# If the user hasn't specified they want to handle the prompt themselves,
+# prepend to the prompt to make it clear we're in a devbox shell.
 export PS1="(devbox) $PS1"
 
 # End Devbox Post-init Hook

internal/devbox/testdata/shellrc/noshellrc/shellrc.golden

@@ -2,7 +2,8 @@
 
 
 
-# Prepend to the prompt to make it clear we're in a devbox shell.
+# If the user hasn't specified they want to handle the prompt themselves,
+# prepend to the prompt to make it clear we're in a devbox shell.
 export PS1="(devbox) $PS1"
 
 # End Devbox Post-init Hook