Update conf.py

Author: mcbarton

docs/conf.py

@@ -56,7 +56,7 @@
 command_emscripten = 'git clone https://github.com/emscripten-core/emsdk.git {0}/emsdk;\
                 {0}/emsdk/emsdk install  3.1.73;\
                 {0}/emsdk/emsdk activate 3.1.73;\
-                cd {0}/emsdk/;
+                cd {0}/emsdk/;\
                 ls;\
                 . emsdk_env.sh;\
                 export SYSROOT_PATH={0}/emsdk/upstream/emscripten/cache/sysroot;\