std lib: modify allocator idiom

Before we accepted a nullable allocator for some stuff like
opening files. Now we require an allocator.

Use the mem.FixedBufferAllocator pattern if a bound on the amount
to allocate is known.

This also establishes the pattern that usually an allocator is the
first argument to a function (possibly after "self").

fix docs for std.cstr.addNullByte

self hosted compiler:
 * only build docs when explicitly asked to
 * clean up main
 * stub out zig fmt

1 files changed, 0 insertions, 1 deletions

diff --git a/build.zig b/build.zig
index facbe1f209..0a7795d615 100644
--- a/build.zig
+++ b/build.zig
@@ -78,7 +78,6 @@ pub fn build(b: &Builder) !void {
     exe.linkSystemLibrary("c");
 
     b.default_step.dependOn(&exe.step);
-    b.default_step.dependOn(docs_step);
 
     const skip_self_hosted = b.option(bool, "skip-self-hosted", "Main test suite skips building self hosted compiler") ?? false;
     if (!skip_self_hosted) {