Add caveat to setting of Windows git executable

See airblade#668.

Author: airblade

README.mkd

@@ -77,13 +77,16 @@ nvim -u NONE -c "helptags vim-gitgutter/doc" -c q
 
 ### Windows
 
-I recommend configuring vim-gitgutter with the full path to your git executable.  For example:
+There is a potential risk on Windows due to `cmd.exe` prioritising the current folder over folders in `PATH`.  If you have a file named `git.*` (i.e. with any extension in `PATHEXT`) in your current folder, it will be executed instead of git whenever the plugin calls git.
+
+You can avoid this risk by configuring the full path to your git executable.  For example:
 
 ```viml
+" This path probably won't work
 let g:gitgutter_git_executable = 'C:\Program Files\Git\bin\git.exe'
 ```
 
-This is to avoid a problem which occurs if you have file named `git.*` (i.e. with any extension in `PATHEXT`) in your current folder.  `cmd.exe` prioritises the current folder over folders in `PATH` and will try to execute your file instead of the `git` binary.
+Unfortunately I don't know the correct escaping for the path - if you do, please let me know!
 
 
 ### Getting started

doc/gitgutter.txt

@@ -63,15 +63,20 @@ Neovim:~
 ===============================================================================
 WINDOWS                                                     *gitgutter-windows*
 
-I recommend configuring vim-gitgutter with the full path to your git executable.
+There is a potential risk on Windows due to `cmd.exe` prioritising the current
+folder over folders in `PATH`.  If you have a file named `git.*` (i.e. with
+any extension in `PATHEXT`) in your current folder, it will be executed
+instead of git whenever the plugin calls git.
+
+You can avoid this risk by configuring the full path to your git executable.
 For example:
 >
+    " This path probably won't work
     let g:gitgutter_git_executable = 'C:\Program Files\Git\bin\git.exe'
 <
-This is to avoid a problem which occurs if you have file named "git.*" (i.e.
-with any extension in "PATHEXT") in your current folder.  "cmd.exe" prioritises
-the current folder over folders in 'PATH' and will try to execute your file
-instead of the "git" binary.
+
+Unfortunately I don't know the correct escaping for the path - if you do,
+please let me know!
 
 
 ===============================================================================