[TODO] explain where whitespace is needed

[moritz]

miso2217 complained on #perl6 that there's no good documentation about where whitespace is needed. For example we need to explain that (and why) these two things are illegal:

 if(1) {  } # function call
 if 1{ }    # parses { } as postcircumfix

[jeteve]

I've been caught by this one :)

[miso2217]

It was originally from a block like this:
if (1){
say 1;
}
else{
say 2;
}

What is a very classic "c/c++ background programmer" way of writing an if statement. This gives the following error: Missing block at line 9, near "else{\n sa".