bash: generate files using writeShellScript

This ensures that the generated file is syntactically valid.

Issue #2015

tests/modules/programs/bash/logout-expected.txt

@@ -1,4 +0,0 @@
-# -*- mode: sh -*-
-
-clear-console
-

tests/modules/programs/bash/logout.nix

@@ -16,7 +16,11 @@ with lib;
       assertFileExists home-files/.bash_logout
       assertFileContent \
         home-files/.bash_logout \
-        ${./logout-expected.txt}
+        ${
+          pkgs.writeShellScript "logout-expected" ''
+            clear-console
+          ''
+        }
     '';
   };
 }

tests/modules/programs/bash/session-variables-expected.txt

@@ -1,8 +0,0 @@
-# -*- mode: sh -*-
-
-. "/home/hm-user/.nix-profile/etc/profile.d/hm-session-vars.sh"
-
-export V1="v1"
-export V2="v2-v1"
-
-

tests/modules/programs/bash/session-variables.nix

@@ -17,7 +17,16 @@ with lib;
       assertFileExists home-files/.profile
       assertFileContent \
         home-files/.profile \
-        ${./session-variables-expected.txt}
+        ${
+          pkgs.writeShellScript "session-variables-expected" ''
+            . "/home/hm-user/.nix-profile/etc/profile.d/hm-session-vars.sh"
+
+            export V1="v1"
+            export V2="v2-v1"
+
+
+          ''
+        }
     '';
   };
 }