Fix formatting of milestone link

docs/source/release/v6.0.0/index.rst

@@ -91,6 +91,6 @@ For a full list of all issues addressed during this release please see the `GitH
 
 .. _forum: https://forum.mantidproject.org
 
-.. _GitHub milestone: https://github.com/mantidproject/mantid/pulls?utf8=%E2%9C%93&q=is%3Apr+milestone%3A"Release Release 6.0"+is%3Amerged
+.. _GitHub milestone: https://github.com/mantidproject/mantid/pulls?utf8=%E2%9C%93&q=is%3Apr+milestone%3A%22Release+6.0%22+is%3Amerged
 
 .. _GitHub release page: https://github.com/mantidproject/mantid/releases/tag/v6.0.0

docs/source/release/v6.2.0/index.rst

@@ -80,6 +80,6 @@ For a full list of all issues addressed during this release please see the `GitH
 
 .. _forum: https://forum.mantidproject.org
 
-.. _GitHub milestone: https://github.com/mantidproject/mantid/pulls?utf8=%E2%9C%93&q=is%3Apr+milestone%3A"Release 6.2"+is%3Amerged
+.. _GitHub milestone: https://github.com/mantidproject/mantid/pulls?utf8=%E2%9C%93&q=is%3Apr+is%3Amerged+milestone%3A%22Release+6.2%22
 
 .. _GitHub release page: https://github.com/mantidproject/mantid/releases/tag/v6.2.0

tools/release_generator/release.py

@@ -91,7 +91,7 @@ For a full list of all issues addressed during this release please see the `GitH
 
 .. _forum: https://forum.mantidproject.org
 
-.. _GitHub milestone: https://github.com/mantidproject/mantid/pulls?utf8=%E2%9C%93&q=is%3Apr+milestone%3A"{sanitized_milestone}"+is%3Amerged
+.. _GitHub milestone: {milestone_link}
 
 .. _GitHub release page: https://github.com/mantidproject/mantid/releases/tag/v{version}
 ''',
@@ -256,7 +256,7 @@ def fixReleaseName(name):
 
 def toMilestoneName(version):
     version = version[1:].split('.')
-    version = '"Release+{major}.{minor}"'.format(major=version[0], minor=version[1])
+    version = 'Release+{major}.{minor}'.format(major=version[0], minor=version[1])
     return version
 
 
@@ -295,7 +295,8 @@ if __name__ == '__main__':
     print('milestone:', args.milestone)
     release_root = getReleaseRoot()
     print('     root:', release_root)
-
+    milestone_link='https://github.com/mantidproject/mantid/pulls?utf8=%E2%9C%93&q=is%3Apr+' \
+        + f'milestone%3A%22{sanitized_milestone}%22+is%3Amerged'
     # add the new sub-site to the index
     addToReleaseList(release_root, args.release)