nimpretty: smart tabs support, fixes #9399 [bugfix]

nimpretty/tests/exhaustive.nim

@@ -396,3 +396,16 @@ proc main() =
     discard
 
 main()
+
+type
+  TCallingConvention* = enum
+    ccDefault,                # proc has no explicit calling convention
+    ccStdCall,    # procedure is stdcall
+    ccCDecl,                  # cdecl
+    ccSafeCall,               # safecall
+    ccSysCall, # system call
+    ccInline,                 # proc should be inlined
+    ccNoInline,               # proc should not be inlined
+    ccFastCall,               # fastcall (pass parameters in registers)
+    ccClosure,        # proc has a closure
+    ccNoConvention       # needed for generating proper C procs sometimes