From 7cb4d8944f37362b4579bcc5054e954e6701b49b Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <m@m-chrzan.xyz>
Date: Thu, 25 Mar 2021 11:53:28 +0100
Subject: Update bash

---
 bash.md | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/bash.md b/bash.md
index d150702..41e8f05 100644
--- a/bash.md
+++ b/bash.md
@@ -29,6 +29,27 @@ Loop over integers
 ## Conditionals
 
 * `-z`: is empty string
+* `-n`: non-empty string
 * `-f`: is regular file
 * `$A == $B`: string equality, accepts globs
 * `$A != $B`: string inequality
+
+## Heredocs
+
+    cat << EOF > file
+    bla bla
+    EOF
+
+Ignoring the initial indent:
+
+    ...
+        cat <<- EOF > file
+        bla bla
+        EOF
+    ...
+
+Don't interpolate variables:
+
+    cat << 'EOF' > file
+    bla bla
+    EOF
-- 
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