From cff229d9fa2994851d17a9cec512de00421fbecc Mon Sep 17 00:00:00 2001
From: Kurtis Rader <krader@skepticism.us>
Date: Wed, 22 Jul 2020 21:21:33 -0700
Subject: [PATCH] Remove two obsolete TODO comments and resolve one

---
 pkg/eval/builtin_fn_io.go  |  4 ----
 pkg/eval/builtin_fn_num.go | 13 ++++++++++++-
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/pkg/eval/builtin_fn_io.go b/pkg/eval/builtin_fn_io.go
index 2469e42b..75a5744c 100644
--- a/pkg/eval/builtin_fn_io.go
+++ b/pkg/eval/builtin_fn_io.go
@@ -198,8 +198,6 @@ import (
 // Etymology: Perl, as
 // [`File::Slurp`](http://search.cpan.org/~uri/File-Slurp-9999.19/lib/File/Slurp.pm).
 
-// TODO(xiaq): Document from-lines.
-
 //elvdoc:fn from-json
 //
 // ```elvish
@@ -233,8 +231,6 @@ import (
 //
 // @cf to-json
 
-// TODO(xiaq): Document to-lines.
-
 //elvdoc:fn to-json
 //
 // ```elvish
diff --git a/pkg/eval/builtin_fn_num.go b/pkg/eval/builtin_fn_num.go
index 2df23335..e36fa354 100644
--- a/pkg/eval/builtin_fn_num.go
+++ b/pkg/eval/builtin_fn_num.go
@@ -9,7 +9,18 @@ import (
 
 // Numerical operations.
 
-// TODO(xiaq): Document float64.
+//elvdoc:fn float64
+//
+// ```elvish
+// float64 123
+// float64 NaN
+// float64 Inf
+// ```
+//
+// Explicitly convert a string to a `float64` data type.
+//
+// It is very rare that this command is needed. See the discussion of the
+// [number](language.html#number) data type.
 
 //elvdoc:fn + - * /
 //