Fix commands using xargs, which causes errors if the user quits fzf without making any selection.

Examples-(fish).md

@@ -97,25 +97,25 @@ end
 
 ```fish
 function fco -d "Fuzzy-find and checkout a branch"
-  git branch --all | grep -v HEAD | string trim | fzf | xargs git checkout
+  git branch --all | grep -v HEAD | string trim | fzf | read -l result; and git checkout "$result"
 end
 
 function fcoc -d "Fuzzy-find and checkout a commit"
-  git log --pretty=oneline --abbrev-commit --reverse | fzf --tac +s -e | awk '{print $1;}' | xargs git checkout
+  git log --pretty=oneline --abbrev-commit --reverse | fzf --tac +s -e | awk '{print $1;}' | read -l result; and git checkout "$result"
 end
 ```
 
 ### SSH
 ```fish
-function fssh -d "Fuzzy-find ssh host and ssh into it"
+function fssh -d "Fuzzy-find ssh host via ag and ssh into it"
-  ag '^host [^*]' ~/.ssh/config | cut -d ' ' -f 2 | fzf | xargs -o ssh
+  ag --ignore-case '^host [^*]' ~/.ssh/config | cut -d ' ' -f 2 | fzf | read -l result; and ssh "$result"
 end
 ```
 
 ### Tmux
 ```fish
 function fs -d "Switch tmux session"
-  tmux list-sessions -F "#{session_name}" | fzf | xargs tmux switch-client -t
+  tmux list-sessions -F "#{session_name}" | fzf | read -l result; and tmux switch-client -t "$result"
 end
 ```
 
@@ -130,6 +130,6 @@ function fpass -d "Fuzzy-find a Lastpass entry and copy the password"
     exit
   end
 
-  lpass ls | fzf | string replace -r -a '.+\[id: (\d+)\]' '$1' | xargs lpass show -c --password
+  lpass ls | fzf | string replace -r -a '.+\[id: (\d+)\]' '$1' | read -l result; and lpass show -c --password "$result"
 end
 ```