lint,flake8: fix flake8 errors

Author: fvalette-ledger

src/outpost/barbican/_internals/cargo_config.py

@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-"""Generate a .cargo/config.toml per cargo app
+"""Generate a .cargo/config.toml per cargo app.
 
 Add target specific and per apps compile flags in a config.
 """

src/outpost/barbican/_internals/cargo_install.py

@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-"""Generate a .cargo/config.toml per cargo app
+"""Generate a .cargo/config.toml per cargo app.
 
 Add target specific and per apps compile flags in a config.
 """

src/outpost/barbican/buildsys/ninja_backend.py

@@ -302,7 +302,7 @@ def add_cargo_package(self, package: "Package") -> None:
                 "cmd": "cargo_config",
                 "args": f"--rustargs-file={str(package._parent._kernel.rustargs)} "
                 + f"--target-file={str(package._parent._kernel.rust_target)} "
-                + f'--extra-args="'
+                + '--extra-args="'
                 + " ".join(package.build_options)
                 + '" '
                 + f"{str(package.build_dir)}",
@@ -340,7 +340,7 @@ def add_cargo_package(self, package: "Package") -> None:
             implicit=f"{package.name}_compile",
             variables={
                 "cmd": "cargo_install",
-                "args": f"--suffix=.elf "
+                "args": "--suffix=.elf "
                 + f"--target-file={str(package._parent._kernel.rust_target)} "
                 + f"{str(package.build_dir)} "
                 + " ".join((str(t.with_suffix("")) for t in package.installed_targets)),