bash.md: update

1 files changed, 13 insertions, 11 deletions

diff --git a/bash.md b/bash.md
index ca3c722..1ca3d13 100644
--- a/bash.md
+++ b/bash.md
@@ -6,25 +6,27 @@ GNU `bash`
 
 ### Expansion
 
-Yes:
+#### Do
 
     func ${arr[@]+"${arr[@]}"}
 
-No:
+#### Don't
 
-    func "${arr[@]}"                # doesn't work with `nounset`
-    func "${arr[@]+"${arr[@]}"}"    # doesn't work with ('')
+    func "${arr[@]}"                # Doesn't work with `nounset`.
+    func "${arr[@]+"${arr[@]}"}"    # Doesn't work properly with `declare -a arr=('')`.
 
 ### `unset`
 
-Yes:
+#### Do
 
     unset -v 'arr[$i]'
 
-No:
+#### Don't
 
-    unset -v arr[x]        # globbing
-    unset -v arr[$i]       # the same problem + quoting
-    unset -v 'arr["x"]'    # doesn't work for some reason
-    unset -v 'arr["]"]'    # the same as above; just to highlight the problem with funny characters in array indices
-                           # insightful discussion: https://lists.gnu.org/archive/html/help-bash/2016-09/msg00020.html
+    unset -v arr[x]        # May break due to globbing.
+    unset -v arr[$i]       # The same as above + possibly a pair of quotes is
+                           # missing.
+    unset -v 'arr["x"]'    # Doesn't work for some reason.
+    unset -v 'arr["]"]'    # The same as above; just highlighting the problem
+                           # with funny characters in array indices.
+                           # An insightful discussion: https://lists.gnu.org/archive/html/help-bash/2016-09/msg00020.html.