Kota Tsuyuzaki 29b8d2da20 Avoid docs warning: Duplicate explicit target name
When we add two (or more than) different links as same target name,
we need to set two underscore[1] instead of one. This avoids "Duplicate
explicit target name" warnings.

1:
http://docutils.sourceforge.net/docs/ref/rst/restructuredtext.html#hyperlink-references

Change-Id: I8a493e7a1deeece33ee1b3fb3f5c848f3cc31d06
2016-06-14 19:20:07 -07:00
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