use arrays instead of piping to head and tail in fstash

Examples.md

@@ -338,24 +338,26 @@ fcs() {
 # ctrl-b checks the stash out as a branch, for easier merging
 fstash() {
   local out q k sha
-    while out=$(
-      git stash list --pretty="%C(yellow)%h %>(14)%Cgreen%cr %C(blue)%gs" |
-      fzf --ansi --no-sort --query="$q" --print-query \
-          --expect=ctrl-d,ctrl-b);
-    do
-      q=$(head -1 <<< "$out")
-      k=$(head -2 <<< "$out" | tail -1)
-      sha=$(tail -1 <<< "$out" | cut -d' ' -f1)
-      [ -z "$sha" ] && continue
-      if [ "$k" = 'ctrl-d' ]; then
-        git diff $sha
-      elif [ "$k" = 'ctrl-b' ]; then
-        git stash branch "stash-$sha" $sha
-        break;
-      else
-        git stash show -p $sha
-      fi
-    done
+  while out=$(
+    git stash list --pretty="%C(yellow)%h %>(14)%Cgreen%cr %C(blue)%gs" |
+    fzf --ansi --no-sort --query="$q" --print-query \
+        --expect=ctrl-d,ctrl-b);
+  do
+    mapfile -t out <<< "$out"
+    q="${out[0]}"
+    k="${out[1]}"
+    sha="${out[-1]}"
+    sha="${sha%% *}"
+    [[ -z "$sha" ]] && continue
+    if [[ "$k" = 'ctrl-d' ]]; then
+      git diff $sha
+    elif [[ "$k" = 'ctrl-b' ]]; then
+      git stash branch "stash-$sha" $sha
+      break;
+    else
+      git stash show -p $sha
+    fi
+  done
 }
 ```
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