sneak in a minor fix in doc and formatting

Author: albestro

stackinator/builder.py

@@ -141,7 +141,7 @@ def environment_meta(self, recipe):
               "root": /user-environment/env/default,
               "activate": /user-environment/env/default/activate.sh,
               "description": "simple devolpment env: compilers, MPI, python, cmake."
-              "env_vars": {
+              "recipe_variables": {
                 ...
               }
             },

stackinator/recipe.py

@@ -292,17 +292,17 @@ def environment_view_meta(self):
                             env.set_list(name, [], envvars.EnvVarOp.SET)
                         else:
                             env.set_scalar(name, value)
+
                 for v in ev_inputs["prepend_path"]:
                     ((name, value),) = v.items()
                     if not envvars.is_list_var(name):
                         raise RuntimeError(f"{name} in the {view['name']} view is not a known prefix path variable")
-
                     env.set_list(name, [value], envvars.EnvVarOp.APPEND)
+
                 for v in ev_inputs["append_path"]:
                     ((name, value),) = v.items()
                     if not envvars.is_list_var(name):
                         raise RuntimeError(f"{name} in the {view['name']} view is not a known prefix path variable")
-
                     env.set_list(name, [value], envvars.EnvVarOp.PREPEND)
 
                 view_meta[view["name"]] = {
@@ -408,6 +408,7 @@ def generate_environment_specs(self, raw):
                 # ["uenv"]["env_vars"] = {"set": [], "unset": [], "prepend_path": [], "append_path": []}
                 if view_config is None:
                     view_config = {}
+
                 view_config.setdefault("link", "roots")
                 view_config.setdefault("uenv", {})
                 view_config["uenv"].setdefault("add_compilers", True)