Fix git elvish module

elvish/lib/git.elv

@@ -6,31 +6,31 @@ ahead     = 0
 behind    = 0
 
 fn refresh-status {
-    branch    = ''
-    dirty     = 0
-    staged    = 0
-    untracked = 0
-    ahead     = 0
-    behind    = 0
+  branch    = ''
+  dirty     = 0
+  staged    = 0
+  untracked = 0
+  ahead     = 0
+  behind    = 0
 
-    _ = ?(
-        data = [(git --no-optional-locks status --ignore-submodules --porcelain=v2 -b 2>/dev/null)]
-        branch = [(splits ' ' $data[1])][2]
+  _ = ?(
+    @data = (git --no-optional-locks status --ignore-submodules --porcelain=v2 -b 2>/dev/null)
+    branch = [(splits ' ' $data[1])][2]
 
-        if (has-prefix $data[3] '# branch.ab') {
-            ahead behind = (explode [(splits ' ' $data[3])][2:])[1:]
-        }
+    if (and (> (count $data) 3) (has-prefix $data[3] '# branch.ab')) {
+      ahead behind = (explode [(splits ' ' $data[3])][2:])[1:]
+    }
 
-        for i $data {
-            if (or (has-prefix $i 1) (has-prefix $i 2)) {
-                if (eq $i[2] .) {
-                    dirty = (+ $dirty 1)
-                } else {
-                    staged = (+ $staged 1)
-                }
-            } elif (has-prefix $i '?') {
-                untracked = (+ $untracked 1)
-            }
+    for i $data {
+      if (or (has-prefix $i 1) (has-prefix $i 2)) {
+        if (eq $i[2] '.') {
+          dirty = (+ $dirty 1)
+        } else {
+          staged = (+ $staged 1)
         }
-    )
+      } elif (has-prefix $i '?') {
+        untracked = (+ $untracked 1)
+      }
+    }
+  )
 }