Revert "变长适应svg文字Demo（变长不够精确）"

This reverts commit 76d88ee18461f2ec97da2e7dd06c2044b649ddd6.
Revert "Revert "变长适应svg文字Demo（变长不够精确）""

This reverts commit 5968aa5be51b9ef88cd990fd409b63fac5068d7f.