Revert "fix(MdChips): make chip allow spaces (#1211)"
Revert "fix(MdChips): make chip allow spaces (#1211)"

This reverts commit 0030083914ffd7c3b2fba56e3316533c214826f5.

VdustR/vue-material,VdustR/vue-material,vuematerial/vue-material,marcosmoura/vue-material,vuematerial/vue-material,marcosmoura/vue-material