Add the "main" abbreviation as the alias of "psvm"

[junichi11]

No description provided.

[svatoun]

Just please be confident that the abbreviation is not "too general": The difference between typing and expansion is just main<SPACE> vs. main<TAB>

[junichi11]

@svatoun Thank you for reviewing it! Yes. I also think so. set and map are as well? They are already included by default. If some users don't expect it, they can remove it easily as a workaround.

[sdedic]

Good examples (map, set). Actually I do not remember these abbreviations got in my way, so the same is hopefully true for main as well. The only possble clash is on class level, but I can't think of "regular" case when main+tab is used; even the user declares main field, the next typed character is most likely ; space or =.

[geertjanw]

Cool. :-)

[junichi11]

Merging.