From 5f3ca811f09dcf6f09fb9b60fcd2664d06762f39 Mon Sep 17 00:00:00 2001
From: Nadrieril
Date: Wed, 28 Oct 2020 20:25:06 +0000
Subject: No need to escape underscores in pretty-printing

---
 dhall/src/syntax/text/printer.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'dhall/src/syntax/text')

diff --git a/dhall/src/syntax/text/printer.rs b/dhall/src/syntax/text/printer.rs
index 0c2eb2e..4b7b8b8 100644
--- a/dhall/src/syntax/text/printer.rs
+++ b/dhall/src/syntax/text/printer.rs
@@ -156,7 +156,9 @@ fn fmt_label(label: &Label, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
     };
     if s.is_empty() {
         write!(f, "``")
-    } else if !is_reserved && s.chars().all(|c| c.is_ascii_alphanumeric()) {
+    } else if !is_reserved
+        && s.chars().all(|c| c.is_ascii_alphanumeric() || c == '_')
+    {
         write!(f, "{}", s)
     } else {
         write!(f, "`{}`", s)
-- 
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