diff --git a/slither/core/declarations/function.py b/slither/core/declarations/function.py
index 11d39dc92..66594216f 100644
--- a/slither/core/declarations/function.py
+++ b/slither/core/declarations/function.py
@@ -1028,19 +1028,21 @@ class Function(ChildContract, ChildInheritance, SourceMapping):
             filename (str)
         """
         from slither.core.cfg.node import NodeType
+        content = ''
         with open(filename, 'w', encoding='utf8') as f:
-            f.write('digraph{\n')
+            content += 'digraph{\n'
             for node in self.nodes:
                 label = 'Node Type: {} {}\n'.format(NodeType.str(node.type), node.node_id)
                 if node.expression:
                     label += '\nEXPRESSION:\n{}\n'.format(node.expression)
                 if node.irs:
                     label += '\nIRs:\n' + '\n'.join([str(ir) for ir in node.irs])
-                f.write('{}[label="{}"];\n'.format(node.node_id, label))
+                content += '{}[label="{}"];\n'.format(node.node_id, label)
                 for son in node.sons:
-                    f.write('{}->{};\n'.format(node.node_id, son.node_id))
+                    content += '{}->{};\n'.format(node.node_id, son.node_id)
 
-            f.write("}\n")
+            content += "}\n"
+        return content
 
     def dominator_tree_to_dot(self, filename):
         """
diff --git a/slither/printers/call/call_graph.py b/slither/printers/call/call_graph.py
index 8710e82ed..4c3058ad6 100644
--- a/slither/printers/call/call_graph.py
+++ b/slither/printers/call/call_graph.py
@@ -163,15 +163,15 @@ class PrinterCallGraph(AbstractPrinter):
         info = ''
         results = []
         with open(filename, 'w', encoding='utf8') as f:
-            info += f'Call Graph: {filename}'
-            content = '\n'.join(['strict digraph {'] + [self._process_functions(self.slither.functions)] +  ['}'])
+            info += f'Call Graph: {filename}\n'
+            content = '\n'.join(['strict digraph {'] + [self._process_functions(self.slither.functions)] + ['}'])
             f.write(content)
             results.append((filename, content))
 
         for derived_contract in self.slither.contracts_derived:
             with open(f'{derived_contract.name}.dot', 'w', encoding='utf8') as f:
-                info += f'Call Graph: {derived_contract.name}.dot'
-                content = '\n'.join(['strict digraph {'] + [self._process_functions(derived_contract.functions)] +  ['}'])
+                info += f'Call Graph: {derived_contract.name}.dot\n'
+                content = '\n'.join(['strict digraph {'] + [self._process_functions(derived_contract.functions)] + ['}'])
                 f.write(content)
                 results.append((filename, content))
 
diff --git a/slither/printers/functions/cfg.py b/slither/printers/functions/cfg.py
index a8b53a3be..0bec28369 100644
--- a/slither/printers/functions/cfg.py
+++ b/slither/printers/functions/cfg.py
@@ -22,8 +22,11 @@ class CFG(AbstractPrinter):
         all_files = []
         for contract in self.contracts:
             for function in contract.functions + contract.modifiers:
-                filename = "{}-{}-{}.dot".format(original_filename, contract.name, function.full_name)
-                info += 'Export {}'.format(filename)
+                if original_filename:
+                    filename = "{}-{}-{}.dot".format(original_filename, contract.name, function.full_name)
+                else:
+                    filename = "{}-{}.dot".format(contract.name, function.full_name)
+                info += 'Export {}\n'.format(filename)
                 content = function.slithir_cfg_to_dot(filename)
                 with open(filename, 'w', encoding='utf8') as f:
                     f.write(content)
diff --git a/slither/printers/inheritance/inheritance.py b/slither/printers/inheritance/inheritance.py
index e6b2972fb..62d816f18 100644
--- a/slither/printers/inheritance/inheritance.py
+++ b/slither/printers/inheritance/inheritance.py
@@ -36,11 +36,10 @@ class PrinterInheritance(AbstractPrinter):
         info += blue('Child_Contract -> ') + green('Immediate_Base_Contracts')
         info += green(' [Not_Immediate_Base_Contracts]')
 
-        result = {}
-        result['child_to_base'] = {}
+        result = {'child_to_base': {}}
 
         for child in self.contracts:
-            info += blue(f'\n+ {child.name}')
+            info += blue(f'\n+ {child.name}\n')
             result['child_to_base'][child.name] = {'immediate': [],
                                                    'not_immediate': []}
             if child.inheritance:
@@ -48,18 +47,18 @@ class PrinterInheritance(AbstractPrinter):
                 immediate = child.immediate_inheritance
                 not_immediate = [i for i in child.inheritance if i not in immediate]
 
-                info += ' -> ' + green(", ".join(map(str, immediate)))
+                info += ' -> ' + green(", ".join(map(str, immediate))) + '\n'
                 result['child_to_base'][child.name]['immediate'] = list(map(str, immediate))
                 if not_immediate:
-                    info += ", ["+ green(", ".join(map(str, not_immediate))) + "]"
+                    info += ", ["+ green(", ".join(map(str, not_immediate))) + "]\n"
                     result['child_to_base'][child.name]['not_immediate'] = list(map(str, not_immediate))
 
-        info += green('\n\nBase_Contract -> ') + blue('Immediate_Child_Contracts')
-        info += blue(' [Not_Immediate_Child_Contracts]')
+        info += green('\n\nBase_Contract -> ') + blue('Immediate_Child_Contracts') + '\n'
+        info += blue(' [Not_Immediate_Child_Contracts]') + '\n'
 
         result['base_to_child'] = {}
         for base in self.contracts:
-            info += green(f'\n+ {base.name}')
+            info += green(f'\n+ {base.name}') + '\n'
             children = list(self._get_child_contracts(base))
 
             result['base_to_child'][base.name] = {'immediate': [],
@@ -68,10 +67,10 @@ class PrinterInheritance(AbstractPrinter):
                 immediate = [child for child in children if base in child.immediate_inheritance]
                 not_immediate = [child for child in children if not child in immediate]
 
-                info += ' -> ' + blue(", ".join(map(str, immediate)))
+                info += ' -> ' + blue(", ".join(map(str, immediate))) + '\n'
                 result['base_to_child'][base.name]['immediate'] = list(map(str, immediate))
                 if not_immediate:
-                    info += ', [' + blue(", ".join(map(str, not_immediate))) + ']'
+                    info += ', [' + blue(", ".join(map(str, not_immediate))) + ']' + '\n'
                     result['base_to_child'][base.name]['not_immediate'] = list(map(str, immediate))
         self.info(info)
 
diff --git a/slither/printers/inheritance/inheritance_graph.py b/slither/printers/inheritance/inheritance_graph.py
index de527809a..4fb3bf877 100644
--- a/slither/printers/inheritance/inheritance_graph.py
+++ b/slither/printers/inheritance/inheritance_graph.py
@@ -161,7 +161,7 @@ class PrinterInheritanceGraph(AbstractPrinter):
             filename = 'contracts.dot'
         if not filename.endswith('.dot'):
             filename += ".dot"
-        info = 'Inheritance Graph: ' + filename
+        info = 'Inheritance Graph: ' + filename + '\n'
         self.info(info)
 
         content = 'digraph "" {\n'
diff --git a/slither/printers/summary/constructor_calls.py b/slither/printers/summary/constructor_calls.py
index aae307827..fd9d17226 100644
--- a/slither/printers/summary/constructor_calls.py
+++ b/slither/printers/summary/constructor_calls.py
@@ -23,8 +23,8 @@ class ConstructorPrinter(AbstractPrinter):
         for contract in self.contracts:
             stack_name = []
             stack_definition = []
-            info += "\n\nContact Name: " + contract.name
-            info += "	Constructor Call Sequence: "
+            info += "\n\nContact Name: " + contract.name + '\n'
+            info += "	Constructor Call Sequence: " + '\n'
             cst = contract.constructors_declared
             if cst:
                 stack_name.append(contract.name)
@@ -35,16 +35,16 @@ class ConstructorPrinter(AbstractPrinter):
                     stack_name.append(inherited_contract.name)
                     stack_definition.append(self._get_soruce_code(cst))
             if len(stack_name) > 0:
-                info += " " + ' '.join(stack_name[len(stack_name) - 1])
+                info += " " + ' '.join(stack_name[len(stack_name) - 1]) + '\n'
                 count = len(stack_name) - 2
                 while count >= 0:
-                    info += "-->" + ' '.join(stack_name[count])
+                    info += "-->" + ' '.join(stack_name[count]) + '\n'
                     count = count - 1
-                info += "\n Constructor Definitions:"
+                info += "\n Constructor Definitions:" + '\n'
                 count = len(stack_definition) - 1
                 while count >= 0:
-                    info += "\n Contract name:" + str(stack_name[count])
-                    info += "\n" + str(stack_definition[count])
+                    info += "\n Contract name:" + str(stack_name[count]) + '\n'
+                    info += "\n" + str(stack_definition[count]) + '\n'
                     count = count - 1
 
         self.info(info)
diff --git a/slither/printers/summary/slithir.py b/slither/printers/summary/slithir.py
index f75c8b062..30b62239b 100644
--- a/slither/printers/summary/slithir.py
+++ b/slither/printers/summary/slithir.py
@@ -22,30 +22,30 @@ class PrinterSlithIR(AbstractPrinter):
         for contract in self.contracts:
             txt += 'Contract {}'.format(contract.name)
             for function in contract.functions:
-                txt += f'\tFunction {function.canonical_name} {"" if function.is_shadowed else "(*)"}'
+                txt += f'\tFunction {function.canonical_name} {"" if function.is_shadowed else "(*)"}\n'
                 for node in function.nodes:
                     if node.expression:
-                        txt += '\t\tExpression: {}'.format(node.expression)
-                        txt += '\t\tIRs:'
+                        txt += '\t\tExpression: {}\n'.format(node.expression)
+                        txt += '\t\tIRs:\n'
                         for ir in node.irs:
-                            txt += '\t\t\t{}'.format(ir)
+                            txt += '\t\t\t{}\n'.format(ir)
                     elif node.irs:
-                        txt += '\t\tIRs:'
+                        txt += '\t\tIRs:\n'
                         for ir in node.irs:
-                            txt += '\t\t\t{}'.format(ir)
+                            txt += '\t\t\t{}\n'.format(ir)
                 for modifier_statement in function.modifiers_statements:
-                    txt += f'\t\tModifier Call {modifier_statement.entry_point.expression}'
+                    txt += f'\t\tModifier Call {modifier_statement.entry_point.expression}\n'
                 for modifier_statement in function.explicit_base_constructor_calls_statements:
-                    txt += f'\t\tConstructor Call {modifier_statement.entry_point.expression}'
+                    txt += f'\t\tConstructor Call {modifier_statement.entry_point.expression}\n'
             for modifier in contract.modifiers:
-                txt += '\tModifier {}'.format(modifier.canonical_name)
+                txt += '\tModifier {}\n'.format(modifier.canonical_name)
                 for node in modifier.nodes:
                     txt += str(node)
                     if node.expression:
-                        txt += '\t\tExpression: {}'.format(node.expression)
-                        txt += '\t\tIRs:'
+                        txt += '\t\tExpression: {}\n'.format(node.expression)
+                        txt += '\t\tIRs:\n'
                         for ir in node.irs:
-                            txt += '\t\t\t{}'.format(ir)
+                            txt += '\t\t\t{}\n'.format(ir)
         self.info(txt)
         res = self.generate_output(txt)
         return res
diff --git a/slither/printers/summary/slithir_ssa.py b/slither/printers/summary/slithir_ssa.py
index 26d962401..53ac73997 100644
--- a/slither/printers/summary/slithir_ssa.py
+++ b/slither/printers/summary/slithir_ssa.py
@@ -21,26 +21,26 @@ class PrinterSlithIRSSA(AbstractPrinter):
 
         txt = ""
         for contract in self.contracts:
-            txt += 'Contract {}'.format(contract.name)
+            txt += 'Contract {}'.format(contract.name) + '\n'
             for function in contract.functions:
-                txt += '\tFunction {}'.format(function.canonical_name)
+                txt += '\tFunction {}'.format(function.canonical_name) + '\n'
                 for node in function.nodes:
                     if node.expression:
-                        txt += '\t\tExpression: {}'.format(node.expression)
+                        txt += '\t\tExpression: {}'.format(node.expression) + '\n'
                     if node.irs_ssa:
-                        txt += '\t\tIRs:'
+                        txt += '\t\tIRs:' + '\n'
                         for ir in node.irs_ssa:
-                            txt += '\t\t\t{}'.format(ir)
+                            txt += '\t\t\t{}'.format(ir) + '\n'
             for modifier in contract.modifiers:
-                txt += '\tModifier {}'.format(modifier.canonical_name)
+                txt += '\tModifier {}'.format(modifier.canonical_name) + '\n'
                 for node in modifier.nodes:
-                    txt += str(node)
+                    txt += str(node) + '\n'
                     if node.expression:
-                        txt += '\t\tExpression: {}'.format(node.expression)
+                        txt += '\t\tExpression: {}'.format(node.expression) + '\n'
                     if node.irs_ssa:
-                        txt += '\t\tIRs:'
+                        txt += '\t\tIRs:' + '\n'
                         for ir in node.irs_ssa:
-                            txt += '\t\t\t{}'.format(ir)
+                            txt += '\t\t\t{}'.format(ir) + '\n'
         self.info(txt)
         res = self.generate_output(txt)
         return res