Printing _PI(10) as SINGLE:
  default:  31.41593
 0 digits:  3E+01       (forced to at least 1 digit)
 1 digits:  3E+01       
 2 digits:  31          
 3 digits:  31.4        
 4 digits:  31.42       
 5 digits:  31.416      
 6 digits:  31.4159     
 7 digits:  31.41593    
 8 digits:  31.41593    (cropped to max. digits for SINGLE)
 9 digits:  31.41593    (cropped to max. digits for SINGLE)
10 digits:  31.41593    (cropped to max. digits for SINGLE)
11 digits:  31.41593    (cropped to max. digits for SINGLE)
12 digits:  31.41593    (cropped to max. digits for SINGLE)
13 digits:  31.41593    (cropped to max. digits for SINGLE)
14 digits:  31.41593    (cropped to max. digits for SINGLE)
15 digits:  31.41593    (cropped to max. digits for SINGLE)
16 digits:  31.41593    (cropped to max. digits for SINGLE)
17 digits:  31.41593    (cropped to max. digits for SINGLE)
18 digits:  31.41593    (cropped to max. digits for SINGLE)
19 digits:  31.41593    (cropped to max. digits for SINGLE)
20 digits:  31.41593    (cropped to max. digits for SINGLE)
