add vim-leader

diff --git a/vim-leader/README.md b/vim-leader/README.md
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+++ b/vim-leader/README.md
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+---
+title: vim-leader
+homepage: https://webinstall.dev/vim-leader
+tagline: |
+  vim leader maps Space as Leader, keep Backslash and Comma as aliases
+---
+
+To update (replacing the current version) run `webi vim-leader`.
+
+## Cheat Sheet
+
+> `let mapleader = " "`
+
+The `<Leader>` key is typically used for your own custom shortcuts.
+
+By default it's mapped to `\` (backslash) - a legacy from a time when `\` was in
+a more accessible place - but most people remap it to `,` or ` ` (space).
+
+This vim-leader plugin makes Space the Leader key, but also remaps `\` and `,`
+as aliases.
+
+### How to configure manually
+
+The Leader key **_MUST_** be defined before any mappings that use it (probably
+before any plugins) - pretty the first thing in your `~/.vimrc`.
+
+```vim
+let mapleader = ' '
+nmap <bslash> <space>
+nmap , <space>
+```

diff --git a/vim-leader/install.sh b/vim-leader/install.sh
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+++ b/vim-leader/install.sh
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+#!/bin/bash
+
+function __init_vim_leader() {
+    set -e
+    set -u
+
+    mkdir -p "$HOME/.vim/plugins"
+    rm -rf "$HOME/.vim/plugins/shell.vim"
+
+    echo ""
+
+    if [ ! -e "$HOME/.vimrc" ]; then
+        touch "$HOME/.vimrc"
+    fi
+
+    if ! grep '^let mapleader =' -r ~/.vimrc > /dev/null 2> /dev/null; then
+        rm -rf ~/.vimrc.new.1
+        printf '" Set Leader to Space (with \\ and , as aliases) by webinstall.dev/vim-shell\n' >> ~/.vimrc.new.1
+        printf 'let mapleader = " "\n' >> ~/.vimrc.new.1
+        printf 'nmap <bslash> <space>\n' >> ~/.vimrc.new.1
+        printf 'nmap , <space>\n' >> ~/.vimrc.new.1
+        printf '\n' >> ~/.vimrc.new.1
+        cat ~/.vimrc >> ~/.vimrc.new.1
+        mv ~/.vimrc.new.1 ~/.vimrc
+    fi
+
+    echo ""
+    echo "Vim Leader set to Space. Edit with 'vim ~/.vimrc'"
+}
+
+__init_vim_leader