libubox: Drop extraneous space when appending values to variable

Don't have a leading space when building out a variable via appends.

Fixes: #15
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz> [fix fixes trailer]

diff --git a/sh/jshn.sh b/sh/jshn.sh
index 1d3055711820e5a21ea59cae49e7bf3f56b626d8..66ca9524a041ebd71cbad044d9a9fc595393296b 100644 (file)
--- a/sh/jshn.sh
+++ b/sh/jshn.sh
@@ -23,7 +23,7 @@ __jshn_raw_append() {
 _jshn_append() {
        # var=$1
        local _a_value="$2"
-       eval "${JSON_PREFIX}$1=\"\${${JSON_PREFIX}$1} \$_a_value\""
+       eval "${JSON_PREFIX}$1=\"\${${JSON_PREFIX}$1}\${${JSON_PREFIX}$1:+ }\$_a_value\""
 }
 
 _get_var() {