This patch removes trailing semicolons in blocklike contexts (`for`,
`if`, ...). Semicolons are left alone in top level contexts since they
are sometimes used there for output suppression (e.g. Documenter
examples or scripts that are copy-pasted/included in the REPL).
Semicolons before comments are replaced with a single space instead of
removed so that if the comments are aligned before, they will be aligned
after, for example
```julia
begin
x = 1; # This is x
y = 2 # This is y
end
```
will become
```julia
begin
x = 1 # This is x
y = 2 # This is y
end
```
Closes#34.
Fredrik Ekre
d4431f1ff5