* stable-2.8:
Replace "\--" with "--" in documentation.
Warn in 2.8 rel. notes that ChangeScreen2 needs download-commands plugin
Add warning about removal of `approve` alias to 2.8 release notes
Add one more fix in the 2.8 release notes
Update 2.8 release notes with changes from stable-2.6 and stable-2.7
Update 2.8.1 release notes with recently merged changes
Fix ArrayIndexOutOfBoundsException on initial commits
SideBySide2: Map .py files to text/x-python
SideBySide2: Map *.cxx and *.hxx to clike CodeMirror mode
Enable syntax coloring for Go, BUCK and .gitmodules
Conflicts:
Documentation/pgm-daemon.txt
Documentation/pgm-init.txt
gerrit-server/src/main/java/com/google/gerrit/server/DefaultFileExtensionRegistry.java
Change-Id: I05c5d47c72d2a5fb524a0622b57ba607fed3bfe3