fix typo in README.md

17 jobs for master in 5 minutes and 10 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #76086
Linux
build-2.7-linux

00:01:27

passed #76087
Apple
build-2.7-macos

00:02:33

failed #76084
Linux
build-3.5-linux

00:00:02

passed #76085
Apple
build-3.5-macos

00:02:36

passed #76083
python37 VS2017
build-3.7-VS2017

00:01:21

 
  Test
skipped #76091
Linux
test-2.7-linux
skipped #76092
Apple
test-2.7-macos
skipped #76089
Linux
test-3.5-linux
skipped #76090
Apple
test-3.5-macos
skipped #76088
python37 VS2017
test-3.7-VS2017
 
  Deploy
skipped #76096
Linux
deploy-2.7-linux
skipped #76097
Apple
deploy-2.7-macos
skipped #76094
Linux
deploy-3.5-linux
skipped #76095
Apple
deploy-3.5-macos
skipped #76093
python37 VS2017
deploy-3.7-VS2017
skipped #76099
Linux
deploy-documentation
skipped #76098
Linux
deploy-sdist
 
Name Stage Failure
failed
build-3.5-linux Build
Entering 'OpenMesh'
HEAD is now at 37be8f8b Merge branch 'PLY_FACE_COLOR' into 'master'
Entering 'pybind11'
HEAD is now at 9a19306 bump version to 2.2.4
Entering 'pybind11/tools/clang'
HEAD is now at 6a00cbc integrated latest cindex.py changes as of 30.03.2017
$ virtualenv --clear -p python3.5 .
The path python3.5 (from --python=python3.5) does not exist
ERROR: Job failed: exit status 1