Fix link quotes on AArch64's CompilerWriterInfo section.

Reviewers: t.p.northover

Subscribers: t.p.northover, aemerson, rengolin

Differential Revision: https://reviews.llvm.org/D23697

llvm-svn: 279169

Author: jpienaar

llvm/docs/CompilerWriterInfo.rst

@@ -18,9 +18,9 @@ AArch64 & ARM
 
 * `ARMv8-A Architecture Reference Manual <http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0487a.h/index.html>`_ (authentication required, free sign-up). This document covers both AArch64 and ARM instructions
 
-* `ARMv7-M Architecture Reference Manual` <http://infocenter.arm.com/help/topic/com.arm.doc.ddi0403e.b/index.html>`_ (authentication required, free sign-up). This covers the Thumb2-only microcontrollers
+* `ARMv7-M Architecture Reference Manual <http://infocenter.arm.com/help/topic/com.arm.doc.ddi0403e.b/index.html>`_ (authentication required, free sign-up). This covers the Thumb2-only microcontrollers
 
-* `ARMv6-M Architecture Reference Manual` <http://infocenter.arm.com/help/topic/com.arm.doc.ddi0419c/index.html>_ (authentication required, free sign-up). This covers the Thumb1-only microcontrollers
+* `ARMv6-M Architecture Reference Manual <http://infocenter.arm.com/help/topic/com.arm.doc.ddi0419c/index.html>`_ (authentication required, free sign-up). This covers the Thumb1-only microcontrollers
 
 * `ARM C Language Extensions <http://infocenter.arm.com/help/topic/com.arm.doc.ihi0053c/IHI0053C_acle_2_0.pdf>`_