I am trying to debug one my macro and finally I reduced it to the simplest form: it accepts an argument, wraps it with “set-bold”, “reset-bold” font requests and that’s all. But the problem is that I want to pass it multiple lines as 1 argument. I tried to embed “n” inside the string, but without success (I still don’t know if it’s possible). So, I switched to a diversion:

." Start a diversion to capture text                                                                                         
.di t1                                                                                                                        
aaa                                                                                                                           
                                                                                                                              
bbb                                                                                                                           
                                                                                                                              
.di                                                                                                                           
                                                                                                                              
." Define a macro to print the diversion content in bold                                                                     
.de MMM                                                                                                                      
.ft B                                                                                                                         
\$1                                                                                                                          
.                                                                                                                             
.ft R                                                                                                                         
..                                                                                                                            
                                                                                                                              
." Use the macro to process and print the diversion (I am
." not sure about asciify too)
.asciify t1                                                                                                                   
.MMM *[t1]

and it prints

aaa

bbb

I.e. “bbb” is not bold! It was a problem to force it to print “bbb”, not only “aaa” (I tried .br between lines but it seems only empty line works fine). And after this, I hit impossibility to bold ALL lines (in the case they are only 2).

So how to force it to make “bbb” bold, I have not idea. I don’t understand even why it happens. Usually such trick works but not with multi-line arguments.

How to fix this simple macro?