sh: Add snippets for 'if' and 'func'

- add portable if test expr
- add snippets to create function

Author: iiey

UltiSnips/sh.snippets

@@ -74,8 +74,14 @@ snippet here "here document (here)"
 ${1/['"`](.+)['"`]/$1/}
 endsnippet
 
+snippet /ift(est)?/ "if ... then (if)" rb
+if ${2:[ ${1:condition} ]}; then
+	${0:${VISUAL}}
+fi
+endsnippet
+
 snippet if "if ... then (if)" b
-if ${2:[[ ${1:condition} ]]}; then
+if [[ ${1:condition} ]]; then
 	${0:${VISUAL}}
 fi
 endsnippet
@@ -92,4 +98,10 @@ while ${2:[[ ${1:condition} ]]}; do
 done
 endsnippet
 
+snippet func "function() {...}" b
+${1:function} () {
+	${0:${VISUAL}}
+}
+endsnippet
+
 # vim:ft=snippets: