style: limit line length to 79 characters

Limited the lengths of all lines to 79 characters (if possible).
Additionally, some other lines were breaked for consistence.

src/jcloud_docsgen/exceptions.py

@@ -24,7 +24,15 @@ class NamespaceError(ValueError):
         if not self.args:
             return ''
         else:
-            return f'{self.args[0]}{": " if self.namespace_identifier and self.args[0] else ""}{self.namespace_identifier if self.args[0] else ""}'
+            return f'{self.args[0]}{
+                ": "
+                if self.namespace_identifier and self.args[0]
+                else ""
+            }{
+                self.namespace_identifier
+                if self.args[0]
+                else ""
+            }'
         
 class InvalidNamespaceError(NamespaceError): ...
 class NamespaceNotFoundError(NamespaceError): ...
@@ -42,7 +50,15 @@ class PythonIdentifierError(ValueError):
         if not self.args:
             return ''
         else:
-            return f'{self.args[0]}{": " if self.identifier and self.args[0] else ""}{self.identifier if self.args[0] else ""}'
+            return f'{self.args[0]}{
+                ": "
+                if self.identifier and self.args[0]
+                else ""
+            }{
+                self.identifier
+                if self.args[0]
+                else ""
+            }'
 
 class InvalidPythonIdentifierError(PythonIdentifierError): ...
 
@@ -58,7 +74,15 @@ class PythonAnnotationError(ValueError):
         if not self.args:
             return ''
         else:
-            return f'{self.args[0]}{": " if self.annotation and self.args[0] else ""}{self.annotation if self.args[0] else ""}'
+            return f'{self.args[0]}{
+                ": "
+                if self.annotation and self.args[0]
+                else ""
+            }{
+                self.annotation
+                if self.args[0]
+                else ""
+            }'
 
 class InvalidPythonAnnotationError(PythonAnnotationError): ...
 
@@ -74,6 +98,14 @@ class PythonDefinitionError(ValueError):
         if not self.args:
             return ''
         else:
-            return f'{self.args[0]}{": " if self.definition and self.args[0] else ""}{self.definition if self.args[0] else ""}'
+            return f'{self.args[0]}{
+                ": "
+                if self.definition and self.args[0]
+                else ""
+            }{
+                self.definition
+                if self.args[0]
+                else ""
+            }'
 
 class PythonArgumentStructureError(PythonDefinitionError): ...