docs: Fix section header committed in r264575
authorTobias Grosser <tobias@grosser.es>
Mon, 28 Mar 2016 17:00:14 +0000 (17:00 +0000)
committerTobias Grosser <tobias@grosser.es>
Mon, 28 Mar 2016 17:00:14 +0000 (17:00 +0000)
commit77e2128580e0fdaf6091454d8f04277e8abf74f7
treeaa7c3923922036a03911710a7e7d01c445db64e2
parent274457e5e80646e19eb9113e241c20999f1ed3dd
docs: Fix section header committed in r264575

Ensure the length of the header underline matches the length of the header.
This prevents SPHINX from erroring on this file and consequently not updating
the documentation.

Also, make this its own point not belonging to the 'increased applicability'
section.

llvm-svn: 264592
polly/docs/ReleaseNotes.rst