diff --git a/src/pystencilssfg/emission/file_printer.py b/src/pystencilssfg/emission/file_printer.py
index ebd89cc84d1c384ce3ba1e7180261c312e410b06..68ac4af73a15bc6cbfe2113c6e0425d5fb50cf62 100644
--- a/src/pystencilssfg/emission/file_printer.py
+++ b/src/pystencilssfg/emission/file_printer.py
@@ -54,12 +54,11 @@ class SfgFilePrinter:
                 hybrid_includes += f"#include {incl}\n"
 
             # include different headers and wrap around guard distinguishing C++/C compilations
-            code += f"""
-            #ifdef __cplusplus\n
-            {includes}
-            #else\n
-            {hybrid_includes}
-            #endif\n"""
+            code += "#ifdef __cplusplus\n" \
+                    f"{includes}" \
+                    "#else\n" \
+                    f"{hybrid_includes}" \
+                    "#endif\n"
         else:
             code += includes
 
@@ -73,7 +72,7 @@ class SfgFilePrinter:
         return code
 
     def visit(
-        self, elem: SfgNamespaceElement | SfgClassBodyElement, inclass: bool = False
+            self, elem: SfgNamespaceElement | SfgClassBodyElement, inclass: bool = False
     ) -> str:
         match elem:
             case str():
@@ -95,9 +94,9 @@ class SfgFilePrinter:
                 assert False, "illegal code element"
 
     def visit_decl(
-        self,
-        declared_entity: SfgKernelHandle | SfgFunction | SfgClassMember | SfgClass,
-        inclass: bool = False,
+            self,
+            declared_entity: SfgKernelHandle | SfgFunction | SfgClassMember | SfgClass,
+            inclass: bool = False,
     ) -> str:
         match declared_entity:
             case SfgKernelHandle(kernel):
@@ -126,9 +125,9 @@ class SfgFilePrinter:
                 assert False, f"unsupported declared entity: {declared_entity}"
 
     def visit_defin(
-        self,
-        defined_entity: SfgKernelHandle | SfgFunction | SfgClassMember | SfgClassBody,
-        inclass: bool = False,
+            self,
+            defined_entity: SfgKernelHandle | SfgFunction | SfgClassMember | SfgClassBody,
+            inclass: bool = False,
     ) -> str:
         match defined_entity:
             case SfgKernelHandle(kernel):
diff --git a/src/pystencilssfg/generator.py b/src/pystencilssfg/generator.py
index 1840c8283a9b7acb31707582c06d9aed0f820fb7..02464266e475b87d94f21053174e1054f16f50e6 100644
--- a/src/pystencilssfg/generator.py
+++ b/src/pystencilssfg/generator.py
@@ -103,12 +103,11 @@ class SourceFileGenerator:
 
         #   TODO: Find a way to not hard-code the 'extern" C"' qualifier in pystencils
         self._header_file.elements.append(
-            """#ifdef __cplusplus\n
-                #define EXTERNC extern \"C\"\n
-                #else\n
-                #define EXTERNC \n
-                #endif\n
-                """
+            "#ifdef __cplusplus\n"
+            "#define EXTERNC extern \"C\"\n"
+            "#else\n"
+            "#define EXTERNC \n"
+            "#endif\n"
         )
 
         outer_namespace: str | _GlobalNamespace = config.get_option("outer_namespace")