Fix indentation issues reported by flake8, requiring code restructuring

Strictly speaking code restructuring isn't needed, but making this PEP8
compliant results in indentation of the code that reduces the
readability. By moving the offending code on the outside of the method
call, the readability is maintained.

mesonbuild/interpreter/interpreter.py

@@ -1829,12 +1829,7 @@ class Interpreter(InterpreterBase, HoldableObject):
 
         self._validate_custom_target_outputs(len(kwargs['input']) > 1, kwargs['output'], "vcs_tag")
 
-        tg = build.CustomTarget(
-            kwargs['output'][0],
-            self.subdir,
-            self.subproject,
-            self.environment,
-            self.environment.get_build_command() +
+        cmd = self.environment.get_build_command() + \
             ['--internal',
              'vcstagger',
              '@INPUT0@',
@@ -1842,7 +1837,14 @@ class Interpreter(InterpreterBase, HoldableObject):
              fallback,
              source_dir,
              replace_string,
-                regex_selector] + vcs_cmd,
+             regex_selector] + vcs_cmd
+
+        tg = build.CustomTarget(
+            kwargs['output'][0],
+            self.subdir,
+            self.subproject,
+            self.environment,
+            cmd,
             self.source_strings_to_files(kwargs['input']),
             kwargs['output'],
             build_by_default=True,

mesonbuild/modules/rust.py

@@ -210,16 +210,20 @@ class RustModule(ExtensionModule):
         else:
             name = header.get_outputs()[0]
 
+        cmd = self._bindgen_bin.get_command() + \
+            [
+                '@INPUT@', '--output',
+                os.path.join(state.environment.build_dir, '@OUTPUT@')
+            ] + \
+            kwargs['args'] + ['--'] + kwargs['c_args'] + inc_strs + \
+            ['-MD', '-MQ', '@INPUT@', '-MF', '@DEPFILE@']
+
         target = CustomTarget(
             f'rustmod-bindgen-{name}'.replace('/', '_'),
             state.subdir,
             state.subproject,
             state.environment,
-            self._bindgen_bin.get_command() + [
-                '@INPUT@', '--output',
-                os.path.join(state.environment.build_dir, '@OUTPUT@')] +
-                kwargs['args'] + ['--'] + kwargs['c_args'] + inc_strs +
-                ['-MD', '-MQ', '@INPUT@', '-MF', '@DEPFILE@'],
+            cmd,
             [header],
             [kwargs['output']],
             depfile='@PLAINNAME@.d',