typo

Author: dahlia

appveyor.yml

@@ -24,7 +24,7 @@ init:
 - "ECHO %PYTHON%"
 - ps: "ls C:/Python*"
 install:
-- git -C %PPVEYOR_BUILD_FOLDER% submodule update --init
+- "git -C %APPVEYOR_BUILD_FOLDER% submodule update --init"
 - ps: (new-object net.webclient).DownloadFile('https://bootstrap.pypa.io/get-pip.py', 'C:/get-pip.py')
 - "%PYTHON%\\python.exe C:/get-pip.py"
 - "%PYTHON%\\Scripts\\pip.exe --version"