fmt: align consts

vlib/v/fmt/fmt.v

@@ -179,10 +179,18 @@ fn (f mut Fmt) stmt(node ast.Stmt) {
 				f.write('pub ')
 			}
 			f.writeln('const (')
+			mut max := 0
+			for field in it.fields {
+				if field.name.len > max {
+					max = field.name.len
+				}
+			}
 			f.indent++
 			for i, field in it.fields {
 				name := field.name.after('.')
-				f.write('$name = ')
+				f.write('$name ')
+				f.write(strings.repeat(` `, max - field.name.len))
+				f.write('= ')
 				f.expr(field.expr)
 				f.writeln('')
 			}

vlib/v/fmt/tests/consts_expected.vv

@@ -1,5 +1,7 @@
 const (
-	pi = 3.14
+	pi     = 3.14
+	phi    = 1.618
+	eulers = 2.7182
 )
 
 pub const (

vlib/v/fmt/tests/consts_input.vv

@@ -1,5 +1,7 @@
 const (
 pi=3.14
+phi=1.618
+eulers=2.7182
 )
 
 pub const (