Implicit line joining rules

[alextretyak]

What are the implicit line joining rules in Nim? (Like those 
[described](https://docs.python.org/3/reference/lexical_analysis.html#implicit-line-joining)
 in Python docs.)

Why this code successfully works in Nim: 
    
    
    if false or
       true:
        echo(1)
    
    
    Run

whereas analogous code does not work in Python: 
    
    
    if False or
       True:
        print(1)
    
    
    Run

(Python requires you to use backslash character (`\`) after `or`, or put a 
whole if expression in parentheses.)