Bug report

Bug summary
Clipped tick labels if emojis were used

Code for reproduction

from __future__importunicode_literalsimportmatplotlib.pyplotaspltfig,ax=plt.subplots()tick_labels= ['😃','😎','😴','😲','❤️']y= [1,4,9,16,25]x=range(5)ax.bar(x,y,tick_label=tick_labels,align='center')ax.xaxis.set_tick_params(labelsize=20)ax.set_title('Диаграмма со смайликами')

Actual outcome

Expected outcome
The tick labels are not clipped

Matplotlib version

• Operating System: Windows 10 1610
• Matplotlib Version: 2.0.2
• Python Version: 3.6.1
• Jupyter Version (if applicable):
• Other Libraries: