Use wat over wast for text format filenames

[sbc100]

No description provided.

[sbc100]

I'm sure I've missed some uses here, but I wanted to be conservative because some uses of wast really are wast files rather than single-module wat files.

[aheejin]

What are the differences between wast and wat files now? Is it ok for wat files not in valid wat format parsable by wabt?

[sbc100]

IIUC, wat is for a single module and wast is for a file that contain any number of modules and/or assertions.

I'm not sure about the second question. Any wat file not in valid should generate parse error in wabt (unless some special option is given such as --no-check perhaps?)

[aheejin]

Hmm, I had an (incorrect) impression that the s-expression format Binaryen uses is the wast format and the straight-line format Wabt uses is the wat format. But it seems Wabt also can parse s-expression format Binaryen uses (although not all of them currently).