Run zig fmt on src/ and lib/std/

This replaces callconv(.Inline) with the more idiomatic inline keyword.

lib/std/math/complex.zig

@@ -38,7 +38,7 @@ pub fn Complex(comptime T: type) type {
 
         /// Imaginary part.
         im: T,
-        
+
         /// Deprecated, use init()
         pub const new = init;