fixed typo in the installation guide (ticket #1844)

diff --git a/doc/tutorials/introduction/linux_install/linux_install.rst b/doc/tutorials/introduction/linux_install/linux_install.rst
index 13b5f60..f0fb500 100644 (file)
--- a/doc/tutorials/introduction/linux_install/linux_install.rst
+++ b/doc/tutorials/introduction/linux_install/linux_install.rst
@@ -72,7 +72,7 @@ Building OpenCV from source using CMake, using the command line
       cd ~/opencv
       mkdir release
       cd release
-      cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX= /usr/local
+      cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..
        
 #. Enter the created temporary directory (<cmake_binary_dir>) and proceed with: