Typo & grammar fixes in README (#1413)

README.md

@@ -127,10 +127,10 @@ But instead of separately installing fzf on your system (using Homebrew or
 vim-plug to do both.
 
 ```vim
-" PlugInstall and PlugUpdate will clone fzf in ~/.fzf and run install script
+" PlugInstall and PlugUpdate will clone fzf in ~/.fzf and run the install script
 Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
   " Both options are optional. You don't have to install fzf in ~/.fzf
-  " and you don't have to run install script if you use fzf only in Vim.
+  " and you don't have to run the install script if you use fzf only in Vim.
 ```
 
 ### Arch Linux
@@ -312,16 +312,16 @@ fullscreen mode.
 fzf --height 40%
 ```
 
-Key bindings for command line
+Key bindings for command-line
 -----------------------------
 
 The install script will setup the following key bindings for bash, zsh, and
 fish.
 
-- `CTRL-T` - Paste the selected files and directories onto the command line
+- `CTRL-T` - Paste the selected files and directories onto the command-line
     - Set `FZF_CTRL_T_COMMAND` to override the default command
     - Set `FZF_CTRL_T_OPTS` to pass additional options
-- `CTRL-R` - Paste the selected command from history onto the command line
+- `CTRL-R` - Paste the selected command from history onto the command-line
     - If you want to see the commands in chronological order, press `CTRL-R`
       again which toggles sorting by relevance
     - Set `FZF_CTRL_R_OPTS` to pass additional options
@@ -373,7 +373,7 @@ cd ~/github/fzf**<TAB>
 
 #### Process IDs
 
-Fuzzy completion for PIDs is provided for kill command. In this case
+Fuzzy completion for PIDs is provided for kill command. In this case,
 there is no trigger sequence, just press tab key after kill command.
 
 ```sh
@@ -426,7 +426,7 @@ _fzf_compgen_dir() {
 
 On bash, fuzzy completion is enabled only for a predefined set of commands
 (`complete | grep _fzf` to see the list). But you can enable it for other
-commands as well like follows.
+commands as well as follows.
 
 ```sh
 complete -F _fzf_path_completion -o default -o bashdefault ag
@@ -443,7 +443,7 @@ Advanced topics
 
 ### Performance
 
-fzf is fast, and is [getting even faster][perf]. Performance should not be
+fzf is fast and is [getting even faster][perf]. Performance should not be
 a problem in most use cases. However, you might want to be aware of the
 options that affect the performance.
 
@@ -454,7 +454,7 @@ options that affect the performance.
 - `--with-nth` makes fzf slower as fzf has to tokenize and reassemble each
   line.
 - If you absolutely need better performance, you can consider using
-  `--algo=v1` (the default being `v2`) to make fzf use faster greedy
+  `--algo=v1` (the default being `v2`) to make fzf use a faster greedy
   algorithm. However, this algorithm is not guaranteed to find the optimal
   ordering of the matches and is not recommended.
 
@@ -475,7 +475,7 @@ See *KEY BINDINGS* section of the man page for details.
 
 ### Preview window
 
-When `--preview` option is set, fzf automatically starts external process with
+When `--preview` option is set, fzf automatically starts an external process with
 the current line as the argument and shows the result in the split window.
 
 ```bash
@@ -483,7 +483,7 @@ the current line as the argument and shows the result in the split window.
 fzf --preview 'cat {}'
 ```
 
-Since preview window is updated only after the process is complete, it's
+Since the preview window is updated only after the process is complete, it's
 important that the command finishes quickly.
 
 ```bash
@@ -582,9 +582,9 @@ fzf -m | while read -l r; set result $result $r; end; and vim $result
 ```
 
 The globbing system is different in fish and thus `**` completion will not work.
-However, the `CTRL-T` command will use the last token on the commandline as the
+However, the `CTRL-T` command will use the last token on the command-line as the
 root folder for the recursive search. For instance, hitting `CTRL-T` at the end
-of the following commandline
+of the following command-line
 
 ```sh
 ls /var/