Missing escape flag for echo

(cherry picked from commit d119277f)
6 jobs for OM6.0-with-python
Status Job ID Name Coverage
  Test
passed #1296
Linux
clang-c++11

00:19:40

failed #1300
Linux
clang-c++98

00:07:42

passed #1294
Linux
gcc-c++11

00:30:22

failed #1298
Linux
gcc-c++98

00:18:50

passed #1301
Apple
macos-c++11

00:09:05

failed #1302
Apple
macos-c++98

00:04:47

 
Name Stage Failure
failed
macos-c++98 Test There is an unknown failure, please try again
test_load_simple_obj_force_vertex_colors_although_not_available (test_read_write_obj.ReadWriteOBJ) ... ok
test_load_simple_obj_with_vertex_colors_after_vertices (test_read_write_obj.ReadWriteOBJ) ... ok
test_load_simple_obj_with_vertex_colors_as_vc_lines (test_read_write_obj.ReadWriteOBJ) ... ok
test_load_simple_off_file (test_read_write_off.ReadWriteOFF) ... ok
test_write_and_read_binary_float_vertex_colors_to_and_from_off_file (test_read_write_off.ReadWriteOFF) ... ok
test_write_and_read_float_vertex_colors_to_and_from_off_file (test_read_write_off.ReadWriteOFF) ... ok
test_write_and_read_vertex_colors_to_and_from_off_file (test_read_write_off.ReadWriteOFF) ... CI/ci-mac.sh: line 98: 3163 Segmentation fault: 11 python -m unittest discover -v

ERROR: Build failed with: exit status 1
failed
clang-c++98 Test There is an unknown failure, please try again
test_create_strange_config (test_add_face.AddFace) ... PolyMeshT::add_face: patch re-linking failed
ok
test_create_triangle_mesh_cube (test_add_face.AddFace) ... ok
test_property_manager (test_python.Python) ... ok
test_python_circulator (test_python.Python) ... ok
test_python_iterator (test_python.Python) ... ok
test_load_ply_from_mesh_lab_with_vertex_colors (test_read_write_ply.ReadWritePLY) ... CI/ci-linux.sh: line 104: 18335 Segmentation fault python -m unittest discover -v

ERROR: Build failed with: exit status 1
failed
gcc-c++98 Test There is an unknown failure, please try again
     ^
src/Python/CMakeFiles/openmesh.dir/build.make:54: recipe for target 'src/Python/CMakeFiles/openmesh.dir/Bindings.cc.o' failed
make[2]: *** [src/Python/CMakeFiles/openmesh.dir/Bindings.cc.o] Error 1
CMakeFiles/Makefile2:1124: recipe for target 'src/Python/CMakeFiles/openmesh.dir/all' failed
make[1]: *** [src/Python/CMakeFiles/openmesh.dir/all] Error 2
Makefile:137: recipe for target 'all' failed
make: *** [all] Error 2

ERROR: Build failed with: exit status 1